By general consent, of course, we strive to ascertain the oldest name on the list; the first that is really and clearly applicable, and we write all other names down as synonyms. In this volume a list of synonyms often accompanies the description; precedes it, showing, year by year, the history of the case; an abstract in fact of the title, as at last approved. The preparation of such an abstract is very troublesome, but is believed to be worth the trouble; must be made, indeed, if we are ever in our discussions to be sure that when we speak or write in America, we are dealing with the same thing intended by the man who speaks or writes in England, or elsewhere.

The space occupied in synonymy, is therefore by no means wasted. By and by, if we succeed in establishing a nomenclature on which competent judges can agree, a thing not at all improbable, almost now attained, the lists may gradually disappear as having historical value only.

b. Taxonomy, in any field, is of necessity concerned with history. For his own sake, no student can ignore the thought and work of his predecessors. No man ever sees nature in completeness, nor even the small part of the world to which he devotes attention. He needs every possible assistance, especially the observations of intelligent men. The present author rejoices to acknowledge the assistance found in volumes written in Europe during the last two hundred years. Such men as Persoon, Bulliard, Schumacher, Schrader, Fries, are deservedly famous; they laid the foundations of mycologic taxonomy. No student can afford to miss Elias Fries; his genius, spirit and scholarship entitle him to the recognition and sympathy of every lover of the intellectual life.

c. The considerations just mentioned may, indeed do, sometimes act as a handicap to the American student, for the simple reason that he comes later to the field of time. He must naturally defer to the decision of men in Europe who are supposedly familiar with original types. An American specimen is presumably the same as one occurring elsewhere in similar latitude and environment. It becomes evident after while that only in certain instances is this undoubtedly the fact. The flora of the American continent has been sufficiently disjoined in space and time from Europe to permit extensive differentiation even in these minor forms, so that we have indeed in the groups we study many species, some genera, definitely autochthonous, more it is believed than are now suspected. An attempt to bring a specimen under the terms of a species described in Western Europe is not seldom an error. It becomes evident, as we go forward, that in eastern North America there are forms not only not described in European literature, but really not, part of European flora, not even adventitiously.

d. Many of the more minute species with which this volume has to do are very elusive, very difficult; for one reason,—perhaps in itself sufficient,—because of their minuteness, and consequent apparent paucity. They may be common, but none the less seldom seen. The comatrichas afford an illustration. There are several very small species. C. pulchella, C. laxa, C. ellisii may be mentioned. C. pulchella has been studied nearly a hundred years and has a synonymy accordingly. In 1875 Rostafinski in the material, and among the descriptions, thought he recognized two distinct forms, and went on to give them names; the first in honor of Persoon, C. persoonii, should show an ovate or ovate-cylindric outline with acuminate tip; the second should be truncate and represent a type first described by Berkeley under a name given by Babington, C. pulchella. Berkeley's drawing shows a sporangium with tip acuminate! Lilac or violaceous tints attracted attention in the spores of C. persoonii only; in C. pulchella all is ferruginous. Curtis is especially commended for noticing the fact in describing S. tenerrima, here included as we see.

Comatricha gracilis Wing. is slender, cylindric and has small spores hardly reaching 6 mu; should perhaps be now set out as a separate species; it is evidently purely an American phase.

Our figures, Plate XII., 16 and 16 a, 18 and 18 a, show C. pulchella and C. gracilis, respectively, extremes. Plate XIII., 4, shows an ovate form not very unusual. This and C. gracilis occur on living leaves.

C. ellisii is another of this minor series, very constant in its delicate beauty, but approaches C. nigra rather than the others here discussed.

C. laxa, as the name implies, shows an open construction, suggested, perhaps, by Rostafinski's photographic print, but better brought out by Celakowsky, Myx. Boehm., Tab. 2, Figs. 7 and 8.

e. It has been shown[40] that the process of cell-division in the spore-plasm of the myxomycete is not dissimilar to that obtaining under the same conditions in higher plants. On this supposition we have explanation of spore-division in Ceratiomyxa and can understand the adherence of spores now and again notable. Once the latter phenomenon was thought peculiar to the genus Badhamia; but the unsculptured epispore of the spores of reticularias, tubiferas, etc., suggest the same thing and more recently we find it in Dianema and in the Stemoniteae; even Stemonitis arrives with clustered spores in groups of four, and we are in sight of a generalization wide.

It is interesting to note that something of this sort was observed by at least one student long ago. Schumacher, Enum. Pl. Sell. 2, p. 215, describes Arcyria atra with the characters of an enerthenema, and says "the capillitial threads are some of them diffuse and bear spermatic globules"! Did he anticipate E. berkleyanum? See the text under that species at p. 190, supra.

f. In a paper read December, 1920, before the Mycological Division of Section G., A. A. A. S., the present writer discussed briefly the physical principles involved in some of the more striking peculiarities of the slime-moulds.

It is argued in that paper that the shaping of stipitate sporangia which is so surprising as relating to the ordinary behaviour of fluid masses, as usually observed, is, in part at least, referable to certain well known properties of fluids generally. For this discussion those interested are referred to the article itself in the November number of Mycologia (N. Y.).

Sufficient to say here that it is a fact, in many cases, that in stipitate fructification, so far as observed, the stipe is first to take form, and, as viewed by the writer, in many cases, as it rises, becomes more and more a most delicate but definite ectosarcate capillary tubule, by which ascends the spore-plasm of the point concerned, to such level as may meet the immediate conditions of pressure, of whatsoever source.

It will be interesting in this view to note the resultant shapes as presented in the sporangia of various genera. One may examine for illustrations Figs. 1, 3, 4, 7, Pl. XX., with the thought in mind that the stipe in each case may have served as a capillary tubule to carry up the spore-plasm to the position in which the spores at length are found. In some species of Hemitrichia, for instance, there are spores or spore-like cells found at maturity in the hollow stipe. In other cases the stipe contains refuse matter.

The capillary theory may not, probably does not, play part in every case. It would seem that a stemonitis, for example, must owe the rise of the spore-plasm to the play of different machinery. Brefeldia, p. 154 above, may offer suggestion.

g. On page two of the introductory section of this volume mention is made of the variety of colors shown in the vegetative phases of the organisms we study. This fact is patent to all observers; but the identity of the plasmodium making the display must be ascertained by painstaking or prolonged and repeated observations. This for the reason that, as I am convinced, only in comparatively few cases is the color unchanged during the life-history of a given fructification. It may sometimes change from hour to hour as development proceeds. The color designated in the descriptive pages of this work is presumably, unless as otherwise set out, that immediately preceding that of the maturing fruit.

As suggestive, and as, it is hoped, contributory to better knowledge of this phase of our subject a list of species is here subjoined as presented by my colleague, Professor Morton E. Peck of Oregon, who has given unusual attention to this particular investigation.

SPECIES PLASMODIUM COLORS

Physarum sinuosum light grey, nearly white, ivory white

Physarum serpula greenish-yellow; yellow

Physarum virescens pale greenish-yellow; yellow

Physarum cinereum watery grey, becoming white; pallid

Physarum didermoides watery grey, becoming white; blue-white

Physarum notabile pure white

Physarum globuliferum greenish-yellow; yellow

Physarum leucopus light grey

Physarum pulcherrimum dark red

Physarum flavicomum greenish or brownish yellow

Physarum viride clear yellow

Physarum wingatense at first grey, then pure white

Badhamia orbiculata pale yellow, passing to white

Physarella oblonga brilliant yellow

Mucilago spongiosa watery grey, then white

Didymium crustaceum white

Didymium squamulosum pale grey, watery white

Diderma floriforme grey tinged with yellow

Stemonitis fusca white passing through blue to black

Stemonitis smithii green to yellow to reddish purple

Comatricha longa white, cream-yellow, reddish purple to dusky

Comatricha irregularis white

Comatricha nigra white

Comatricha typhoides bluish white

Diachaea splendens pure white

Enerthenema papillatum colorless or greenish

Reticularia lycoperdon white

Dictydiaethalium plumbeum colorless, pink, salmon, rose, orange, chocolate brown

Lindbladia effusa brown, lead-colored

Tubifera ferruginosa watery white, scarlet, brown, almost black

Cribraria dictydioides clear dark green

Cribraria tenella watery, dark plumbeous, bronze

Cribraria cuprea red

Arcyria nutans white

Arcyria denudata watery white, then flesh-color

Arcyria cinerea grey, then white

Trichia varia colorless, then white

h. In a few instances references to illustration do not find place in connection with the descriptive matter. One phase of Physarum albescens is figured on Pl. III.; Mucilago will be found portrayed on Pl. VII.; Physarum viride on Pl. VIII.

j. The group before us has research possibilities not a few. The question of their nutrition and its limits in respect of variety, is yet to be solved. From present indications all that can be said is to the effect that a pabulum similar in variety, no doubt meets the needs of many species. Whether in artificial culture a single base as gelatin or agar would suffice for all or several is yet to be discovered.

Whether a species brought from spore to maturity on artificial diet would conform in any reasonable way to our dim concept of its identity is also, it would seem, a problem. The variation in the field would seem to make it doubtful.

From the table immediately preceding it is plain that there is place for doubt. Color it is surmised is of itself everywhere incidental; the structure, which maintains identity or the reverse, lies deeper, although color may be none the less, in some way a resultant, and therefore in so far a reliable taxonomic guide.

The treatment of our subject so far by no means exhausts the possibilities of even the simpler phases of microscopic study. We have endeavored to appreciate the work of those who hand us the literature of the group, and to recognize what such keen-eyed men have seen; but in our western and southern forests there are probably double as many species, as species go, as we have listed.

The entire group is, as it would seem, in highest measure worthy of investigation and comprehension, and should it at any time prove that to such accomplishment the present volume may have been in any smallest way contributory, the author's satisfaction will be complete indeed.

FOOTNOTES:

[40] Farr. Cell-division in Pol. Mother-cells, Cobaea scandens, Bull. Tor. Bot. Cl., Vol. 47, pp. 325-38.



INDEX

NATURAL ORDERS, etc.

CRIBRARIALES, 199

EXOSPOREAE, 18

LYCOGALALES, 232

PHYSARALES, 22

PHYTOMYXINAE, 17

STEMONITALES, 148

TRICHIALES, 236

GENERA

ALWISIA, 208 Alwis; personal.

AMAUROCHAETE, 148 [Greek: amauros], dusky, and [Greek: chaite], hair. Gr.

ARCYRIA, 247 [Greek: arkyon] a net. Gr.

BADHAMIA, 313 C. D. Badham; personal.

BREFELDIA, 154 O. Brefeld; personal.

CALONNEMA, 266 [Greek: kalos], beautiful, and [Greek: nema], a thread. Gr.

CERATIOMYXA, 18 [Greek: keration], a small horn, and [Greek: myxa], mucus. Gr.

CIENKOWSKIA, 110 Leon Cienkowski; personal

CLASTODERMA, 191 [Greek: klastos], broken, and [Greek: derma], dermis, skin or covering. Gr.

COLLODERMA, 147 [Greek: kolla], glue, and [Greek: derma], dermis, covering.

COMATRICHA, 171 [Greek: kome], and [Greek: thrix], both words meaning hair. Gr.

CRATERIUM, 103 [Greek: krater], a vessel. Gr.

CRIBRARIA, 216 cribrum, a sieve. Lat.

DIACHAEA, 185 [Greek: diacheiu], to pour out; the application not patent. Gr.

DIANEMA, 238 [Greek: dia], through or across, and [Greek: nema], thread. Gr.

DICTYDIUM, 230 [Greek: diktyon], a net. Gr.

DICTYDIAETHALIUM, 215 Dictydium and aethalium; the latter from [Greek: aithalos], sooty. Gr.

DIDERMA, 129 [Greek: dis], twice or twofold, and [Greek: derma], as above. Gr.

DIDYMIUM, 115 [Greek: didymos], double. Gr.

ECHINOSTELIUM, 198 [Greek: echinos], a sea-urchin, and [Greek: stelion], (?), a handle or stem. Gr.

ENERTHENEMA, 189 [Greek: enerthe], below, and [Greek: nema], a thread.

ENTERIDIUM, 211 [Greek: enteron] the intestine. Gr.

FULIGO, 23 fuligo, soot. Lat.

Hemiarcyria, 259 [Greek: hemi], half, and Arcyria.

HEMITRICHIA, 259 [Greek: hemi], half, and Trichia.

HETEROTRICHIA, 256 [Greek: heteros], other, and Trichia.

LACHNOBOLUS, 245 [Greek: lachnos], woolly, and [Greek: bolos], a lump. Gr.

LAMPRODERMA, 191 [Greek: lampros], shining, and [Greek: derma], as above. Gr.

LEOCARPUS, 111 [Greek: leios], smooth, and [Greek: karpos], fruit. Gr.

LEPIDODERMA, 144 [Greek: lepis], a scale, and [Greek: derma], a covering. Gr.

LICEA, 199 said to be Latin; licium, a thrum, a girdle.

LINDBLADIA, 203 A. Lindblad; personal.

LYCOGALA, 233 [Greek: lykos], a wolf, and [Greek: gala], milk. Gr.

MARGARITA, 237 [Greek: margarites], a pearl. Gr.

MUCILAGO, 113 mucilago, musty juice. Lat.

OLIGONEMA, 278 [Greek: oligos], few, and [Greek: nema], a thread. Gr.

OPHIOTHECA, 240 [Greek: ophis], a serpent, and [Greek: theke], a case. Gr.

ORCADELLA, 203 [Greek: orka], a cask (?). Diminutive.

PERICHAENA, 242 [Greek: peri], around, and [Greek: chainein], to crack open. Gr.

PHYSARUM, 45 [Greek: physa], a bladder, something inflated.

PHYSARELLA, 71 Diminutive of Physarum.

PLASMODIOPHORA, 17 [Greek: plasma], something formed, and [Greek: phoros], that bears. Gr.

PROTOTRICHIA, 257 [Greek: protos], first, and Trichia.

RETICULARIA, 209 reticulum, a small net. Lat.

STEMONITIS, 156 Like a stamen.

TILMADOCHE, 95 [Greek: tilma], lint, and [Greek: doche], containing. Gr.

TRICHIA, 267 [Greek: ophix], hair. Gr.

TUBIFERA, 205 tubus, a tube, and fero, I bear. Lat.

GENERA AND SPECIES

Aethaliopsis,, 26. stercoriformis Zopf., 27.

Aethalium, 23. flavum Link., 27. septicum Fr., 27.

ALWISIA, 208. bombarda Berk. & Br., 208.

AMAUROCHAETE, 148. atra (Alb. & Schw.) Rost., 6, 149. cribrosa (Fr.) Macbr., 150. fuliginosa (Sow.) Macbr., 149. tubulina (Alb. & Schw.) Macbr., 150. minor Sacc. & Ell., 145.

Angioridium, 52. sinuosum Grev., 52.

ARCYRIA, 247. albida Pers., 245. bicolor Berk. & C., 255. cinerea (Bull.) Pers., 254. conglobosa Macbr., 255. decipiens Pers., 276. denudata (L.) Sheld., 253. digitata (Schw.) Rost., 255. ferruginea Sauter., 253. flava Pers., 249. gabriellae Rav., 257. globosa Schw., 245. incarnata Pers., 6, 251. insignis Kalchbr. & Cke., 256. leucocephala Pers., 105. magna Rex, 248. nodulosa Macbr., 252. nutans (Bull.) Grev., 249. oerstedtii Rost., 249. pomiformis (Leers) Rost., 255. punicea Pers., 253. stipata, List., 262. versicolor Phill., 250. vitellina Phill., 250.

BADHAMIA, 31. affinis Rost., 35. capsulifera (Bull.) Berk., 38, 40. chrysotricha Berk. & C., 34. decipiens (Curt.) Berk., 34. decipiens Berk., 49, 63. foliicola G. List., 39. gracilis var. Macbr., 37. hyalina (Pers.) Berk., 40. iowensis Macbr., 36. inaurata Currey, 34. lilacina (Fr.) Rost., 65. macrocarpa (Ces.) Rost., 37. macrocarpa Rost., 37. magna Peck, 38. nitens Berk., 34. nodulosa Mass., 51. orbiculata Rex, 37. ovispora Racib., 33. panicea (Fr.) Rost., 35, 51. papaveracea Berk. & R., 42. penetralis Cke. & Ell., 177. populina List., 41. rubiginosa (Chev.) Rost., 43. subaquila Macbr., 44. utricularis (Bull.) Berk., 39. varia Mass., 38. verna Fries, 51. versicolor List., 33.

BREFELDIA, 154. maxima (Fr.) Rost., 154.

Byssus. fruticulosa Fl. Dan., 19.

CALONEMA, 266. aureum Morg., 266.

CERATIOMYXA, 18. arbuscula Berk. & Br., 20. filiforma Berk. & Br., 20. fruticulosa (Muell.) Macbr., 19. mucida Schroet., 19, 21. porioides (Alb. & Schw.) Schroet., 19, 20, 21.

Ceratium, hydnoides Alb. & Schw., 19. porioides Alb. & Schw., 19, 20.

Chondrioderma, see Diderma. aculeatum Rex, 139. calcareum Rost., 95. crustaceum (Peck) Berl., 135. globosum (Pers.) Rost., 134. michelii (Lib.) Rost., 138. niveum Rost., 137. radiatum (L.) Rost., 141. reticulatum Rost., 131. roanense Rex, 141. rugosum Rex, 144 sauteri Rost., 139. stromateum (Link.) Rost., 132. testaceum (Schrad.) Rost., 137. trevelyani (Grev.) Rost., 142.

CIENKOWSKIA, 110. reticulata (Alb. & Schw.) Rost., 49, 111.

Cionium, xanthopus Ditm., 123.

CLASTODERMA, 191. debaryanum Blytt., 191.

Clathroptychium, 215. rugulosum (Wallr.) Rost., 215.

Clathrus. adnatus Batsch, 251. denudatus L., 253. ramosus Retz., 193.

Clavaria, 19. byssoides Bull., 19. puccinia Batsch, 19.

COLLODERMA, 147. oculatum (Lipp.) G. List., 147.

COMATRICHA, 171. aequalis Peck, 180. caespitosa Sturg., 173. crypta Schw., 127. cylindrica (Bilgr.) Macbr., 173. elegans (Racib.) G. List., 182. ellisiana (Cke.) Ell. & Ev., 177. ellisii Morg., 184. flaccida (List.) Morg., 174. friesiana (DBy.) Rost., 128. gracilis Wing, 183. irregularis Rex, 176. laxa Rost., 177, 184. longa Peck, 175. nigra (Pers.) Schroet., 178, 184. obtusata (Preuss.) List., 179, 190. persoonii Rost., 183. pulchella (Bab.) Rost., 183. rubens List., 183. shimekiana Macbr., 144. stemonitis (Scop.) Shel., 181. subcaespitosa Peck, 132. suksdorfii Ell. & Ev., 178. typhina (Pers.) Rost., 181. typhoides (Bull.) Rost., 163, 181.

Cornuvia, 240, 241. circumscissa (Wallr.) Rost., 241. wrightii (Berk. & C.) Rost., 241.

Crateriachaea. crateriachaea mutabilis Rost., 99.

CRATERIUM, 73. aureum (Schum.) Rost., 104. citrinellum List., 37. concinnum Rex, 107. confusum Mass., 79. convivale (Batsch) Morg., 105. cylindricum Mass., 106. leucocephalum (Pers.) Ditm., 105, 106. lilacinum Mass., 65. maydis Morg., 91. minimum Berk. & C., 106. minutum (Leers) Fr., 107, 108. mutabile Fr., 104. nodulosum (C. & B.) Morg., 51. obovatum Peck, 70. paraguayense (Speg.) List, 103. pedunculatum Trent., 58, 107, 108. rubescens Rex, 103. rubiginosum Mass., 70. vulgare Ditm., 107.

CRIBRARIA, 216. argillacea Pers., 218. aurantiaca Schrad., 221. cernua Pers., 230. cuprea Morg., 229. dictydioides Cke. & Balf., 222. elegans Berk. & C., 228. intricata (Schrad.) Rost., 223. languescens Rex, 229. macrocarpa Schrad., 219. microcarpa (Schrad.) Pers., 226. microscopica Berk. & C., 220. minima Berk. & C., 220. minutissima Schw., 220. piriformis Schrad., 228. purpurea Schrad., 228. rufa (Roth) Rost., 220. splendens (Schrad.) Pers., 221. tenella Schrad., 225. violacea Rex, 227. vulgaris Schrad., 222.

Cytidium. melleum (Berk. & Br.) Morg., 65. ravenelii (Berk. & C.) Morg., 48. rufipes (Alb. & Schw.) Morg., 50.

Dermodium, 236. conicum (Pers.) Rost., 236.

DIACHAEA, 185. bulbillosa (Berk. & Br.) List., 188. caespitosa List., 173. cylindrica (Bilgr.) List., 173. elegans Fr., 186. leucopodia (Bull.) Rost., 186. splendens Peck, 187. subsessilis Pk., 187. thomasii Rex, 173, 188.

DIANEMA, 238. andersoni Morg., 239. corticatum List., 238. harveyi Rex, 238.

DICTYDIAETHALIUM, 215. plumbeum (Schum.) List., 215.

DICTYDIUM, 230. cancellatum (Batsch) Macbr., 6, 230. cancellatum cancellatum Macbr., 231. cancellatum purpureum Macbr., 232, 173. cancellatum prolatum Macbr., 232. cernuum Nees, 230. longipes Morg., 231. microcarpon Schrad., 226. splendens Schrad., 221. umbilicatum Schrad., 230.

DIDERMA, 129. albescens Phill., 137. asteroides List., 143. brunneolum Phill., 58. cinereum Morg., 138. citrinum Peck, 37. conglomeratum Fr., 57. contextum Pers., 31. cor-rubrum Macbr., 140. crustaceum Peck, 135. difforme (Pers.) Morg., 126. effusum (Schw.) Morg., 130. floriforme (Bull.) Pers., 143. geasteroides Phill., 142. globosum Pers., 134. globuliferum Fr., 46. granulatum (Schw.) Fr., 31. hemisphericum (Bull.) Horne., 138. laciniatum Phill., 142. lyallii Mass., 136. mariae-wilsoni Clinton, 137. minutum (Schum.) Fr., 31. niveum (Rost.) Macbr., 137. oblongum Fr., 40. ochraceum Hoffm., 140. ochroleucum Berk. & C., 31. persoonii Macbr., 126. radiatum (L.) Morg., 141. reticulatum Fr., 111, 130. reticulatum (Rost.) Morg., 131. roanense (Rex) Macbr., 141. rufipes (Alb. & Schw.) Fr., 50. rugosum (Rex) Macbr., 144. sauteri (Rost.) Macbr., 139. simplex List., 132. spumarioides Fr., 132. squamulosum Alb. & Schw., 119. stellare (Schrad.) Pers., 141. testaceum (Schrad.) Pers., 137. trevelyani (Grev.) Fr., 142. vernicosum Pers., 112.

DIDYMIUM, 115. anellus Morg., 117. annulatum Macbr., 125. anomalum Sturg., 127. chrysopeplum Berk. & C., 47. cinereum (Batsch) Fr., 35. clavus (Alb. & Schw.) Rabh., 122. complanatum (Batsch) Rost., 116. connatum Peck, 41. crustaceum Fr., 118. difforme Duby, 126. dubium Rost., 126. effusum Link., 119. erythrinum Berk., 50. excelsum Jahn, 128. eximium Peck, 124. farinaceum Schrad., 121. fulvum Sturg., 118. glaucum Phill., 41. gyrocephalum Mont., 95. hemisphericum (Bull.) Fr., 138. intermedium Schrad., 128. lateritium Berk. & Rav., 33. leoninum Berk. & Br., 128. melanopus Fr., 122. melanospermum (Pers.) Macbr., 121. melleum Berk. & Br., 47. michelii Lib., 138. microcarpon (Fr.) Rost., 123. minus List., 121. nigripes Fr., 91. nigripes (Link) Fr., 123. obrusseum Berk. & C., 52. oculatum Lipp., 147. paraguayense Speg., 103. polycephalum (Schw.) Fr., 95. polymorphum Mont., 95. proximum Berk. & C., 123. quitense (Pat.) Torr., 127. ravenelii Berk. & C., 48. serpula Fr., 116. squamulosum (Alb. & Schw.) Fr., 119. stellare Schrad., 141. tenerrimum Berk. & C., 52. testaceum Schrad., 137. tigrinum Schrad., 145. trochus List., 125. wilczekii Meylan, 117. xanthopus (Ditm.) Fr., 123. zeylanicum Berk. & Br., 102.

Diphtherium. flavofuscum Ehr., 176.

ECHINOSTELIUM, 198. minutum DeBary, 198.

ENERTHENEMA, 189. berkeleyanum Rost., 190. elegans Bowm., 190. papillatum (Pers.) Rost., 190. syncarpon Sturg., 190.

ENTERIDIUM, 211. cinereum Schw., 26. minutum Sturg., 214. olivaceum Ehr., 214. rozeanum (Rost.) Wing., 211. splendens Morg., 211.

ERIONEMA, 31. aureum Penz., 31.

FULIGO, 23. cinerea (Schw.) Morg., 26. ellipsospora List., 26. flava Pers., 29. intermedia Macbr., 30. laevis Pers., 29. megaspora Sturg., 30. muscorum Alb. & Schw., 25. ochracea Peck, 25. ovata (Schaeff.) Macbr., 6, 27. plumbea Schum., 215. rufa Pers., 28. septica (L.) Gmel., 27. varians Rost., 27. varians Sommf., 23. violacea Pers., 29.

Hemiarcyria, see next, 259.

HEMITRICHIA, 259. ablata Morg., 264. clavata (Pers.) Rost., 264. funalis Morg., 264. intorta List., 263. karstenii Rost., 260. leiocarpa Cooke, 263. longifila Rex, 263. montana Morg., 266. obscura Rex, 260. ovata (Pers.) Macbr., 261. plumosa (Morg.), 265. rubiformis (Pers.) Rost., 262. serpula (Scop.) Rost., 260. stipata (Schw.) Rost., 262. stipitata Mass., 265. varneyi Rex, 263. vesparium (Batsch) Macbr., 262. wigandii Rost., 261.

HETEROTRICHIA, 256. gabriellae (Rav.) Mass., 257.

Isaria. mucida Pers., 19.

LACHNOBOLUS, 245. congesta Berk. & Br., 247. cribrosus Fr., 150. globosus (Schw.) Rost., 245. incarnatus (Alb. & Schw.) Schroet., 246. occidentalis Macbr., 246.

LAMPRODERMA, 191. arcyrioides (Sommf.) Morg., 194. arcyrioides iridea Cke., 195. arcyrionema Rost., 197. columbinum (Pers.) Rost., 194. ellisiana Cke., 177. irideum (Cke.) Mass., 195. minutum Rost., 144. physaroides (Alb. & Schw.) Rost., 192. robustum Ell. & Ev., 193. sauteri Rost., 193. scintillans (Berk. & Br.) List., 195. violaceum (Fr.) Rost., 196.

Leangium. stipatum Schw., 262. trevelyani Grev., 142.

LEOCARPUS, 111. fragilis (Dicks.) Rost., 112. fragilis Link., 81. fulvus Macbr., 86. vernicosum Link., 112.

LEPIDODERMA, 144. carestianum Rost., 145. chailletii Rost, 146. stellatum Mass., 61. tigrinum (Schrad.) Rost., 128, 145.

LICEA, 199. biforis Morg., 201. effusa Ehr., 203. minima Fr., 201. ochracea Peck, 25. pusilla Schrad., 202. rugulosa Wallr., 215. stipitata Berk. & R., 207. variabilis Schrad., 200.

LINDBLADIA, 203. effusa (Ehr.) Rost., 204. tubulina Fr., 154.

LYCOGALA, 233. atrum Alb. & Schw., 149. conicum Pers., 236. contortum Ditm., 269. epidendrum (Buxb.) Fr., 6, 233. exiguum Morg., 236. flavofuscum (Ehr.) Rost., 234. miniata Pers., 234. terrestre Fries, 234.

Lycoperdon, 175. cinereum Batsch, 34. complanatum Batsch, 116. corticale Batsch, 243. epidendron (Buxb.) L., 233. favogineum Batsch, 272. fragile Dicks., 81. fuliginosum Sow., 149. pusillum Hedw., 276. radiatum L., 141. vesparium Batsch, 262.

MARGARITA metallica (Berk. & Br.) List., 237.

MUCILAGO, 113. spongiosa (Leyss.) Morg., 114.

Mucor, 23. cancellatus Batsch, 230. ovatus Schaeff., 27. pomiformis Leers, 255. septicus L., 27. serpula Scop., 260. spongiosus Leyss., 83. stemonitis Scop., 181.

OLIGONEMA, 278. brevifilum Peck, 280. flavidum (Peck) Mass., 279. fulvum Morg., 281. nitens (Lib.) Rost., 280.

OPHIOTHECA, 240. chrysosperma Currey, 241. pallida Berk. & C., 240. umbrina Berk. & C., 240. vermicularis (Schw.) Macbr., 240. wrightii Berk. & C., 241.

ORCADELLA, 203. operculata Wing., 203.

Orthotrichia, 191. microcephala Wing., 191.

PERICHAENA, caespitosa Peck, 204. corticalis (Batsch) Rost., 243. depressa Lib., 6, 242. flavida Peck, 279. incarnata (Alb. & Schw.) Fr., 247. irregularis Berk. & C., 243. marginata Schw., 244. pallida (Schw.) Rost., 240. populina Fr., 243. quadrata Macbr., 243. vaporaria Schw., 242.

PHYSARELLA, 108. mirabilis Peck, 109. oblonga (Berk. & C.) Morg., 109.

PHYSARUM, 45. aeneum (List.) R. G. Fries, 101. affine Rost., 80. albescens Ell., 86. albicans Peck, 66. album Fr., 76. alpinum G. List., 54. atrorubrum Peck, 68. atrum Schw., 78. aurantium Pers., 98. aureum Pers., 98. auriscalpium Cke., 86, 90. berkeleyi (Rost.) List., 92, 93. bethelii (Macbr.) List., 94. bitectum List., 53. bivalve Pers., 52. bogoriense Racib., 54. brunneolum Phill., 58. caespitosum Schw., 85. calidris List., 76. carneum List. & Sturg., 85. cernuum (Schum.) Fr., 97. chrysopeplum Berk. & C., 65. chrysotrichum Berk. & C., 34, 50. cinereum (Batsch) Pers., 51, 59, 99. cinereum Ell. & Ev., 36. citrinellum Peck, 85. citrinum Schum., 66, 85. clavus Alb. & Schw., 122. columbinum Macbr., 66. columbinum Pers., 73. compactum List., 72. compressum Alb. & Schw., 80. confertum Macbr., 64. confluens (Pers.) Morg., 80. conglomeratum (Fr.) Rost., 57. connatum Peck, 80. connexum (Link.) Morg., 80. contextum Pers., 56. crateriforme Petch., 100. cupripes Berk. & R., 93. decipiens Curt., 34. dictyospermum List., 100. diderma Rost., 53, 55. didermoides (Ach.) Rost., 6, 55, 78. discoidale Macbr., 74. ditmari Rost., 61. echinosporum List., 101. effusum Schw., 130. ellipsosporum Rost., 26. erythrinum Berk., 69. farlowii Rost., 66. flavidum Peck, 57. flavicomum Berk., 93. flavum Fr., 84. fulvum List., 86. galbeum Wing., 92. glaucum (Phill.) Mass., 41. globuliferum (Bull.) Pers., 66. griseum Link., 59. gulielmae Penzig, 101. gyrosum Rost., 49, 94, 95. hyalinum Pers., 40. inaequale Peck, 50. instratum Macbr., 62. lateritium (Berk. & Br.) Rost., 50. leucophaeum Fr., 75. leucophaeum (Fr.) Macbr., 80. leucopus Link., 79. lilacinum Sturg. & Bilg., not Fr., 67. lividum Rost., 78. luteum Pers., 59. luteo-album List., 71. macrocarpon Cesati, 37; Fuckel, 102. maculatum Macbr., 77. maydis Torr., 91. megalosporum Sturg., 63. melanospermum Pers., 88. melleum (Berk. & Br.) Mass., 65. microcarpon Fr., 123. mortoni Macbr., 58. murinum List., 68. mutabile (Rost.) List., 99. nefroideum Rost., 80. newtoni Macbr., 73. nicaraguense Macbr., 83. nigripes Link., 123. nodulosum Cke. & Balf., 76. notabile Macbr., 80. nucleatum Rex, 72. nutans Pers., 75, 97. oblatum Macbr., 91. oblongum Fr., 78. obrusseum (Berk. & C.) Rost., 92. ochroleucum Berk. & C., 57. ornatum Peck, 91. paniceum Fr., 35. penetrale Rex, 70. petersii Berk. & C, 66, 69, 92. phillipsii Balf., 41. physaroides Alb. & Schw., 139. plumbeum Fr., 59. polycephalum Schw., 95. polymorphum (Mont.) Rost., 80, 92. polymorphum Rost., 52. psittacinum Ditm., 74. pulcherrimum Berk. & Rav., 68. pulcherripes Peck, 69. pusillum List., 76. ravenelii (Berk. & C.) Mass., 68. reniforme List., 83. reticulatum Alb. & Schw., 49, 111. roseum Berk. & Br., 100. rostafinskii Mass., 57. rubiginosum Chev., 62. rufipes Alb. & Schw., 69. schumacheri Spreng., 65. scyphoides Cke. & Balf., 105. serpula Morg., 49. sinuosum (Bull.) Weinm., 52. straminipes List., 100. striatum Fries, 59. stromateum Link, 132. sulphureum (Alb. & Schw.) Sturg., 84. tenerum Rex., 77. tenerum Rex, 92. testaceum Sturg., 55. thejoteum Fr., 62. tropicale Macbr., 82. utriculare (Bull.) Chev., 39. variabile Rex, 89. vernum Rost., 51. vermicularis Schw., 240. viride Pers., 98. virescens Ditm., 61, 62. wingatense Macbr., 72.

PLASMODIOPHORA, 17. brassicae Wor., 18.

Protoderma. pusilla Rost., 202.

PROTOTRICHIA, 257. flagellifera (Berk. & Br.) Rost., 258. metallica (Berk.) Mass., 258.

Puccinia, 18. byssoides Gmel., 19. ramosa, etc., Mich., 19.

Raciborskia. elegans Berl., 182.

RETICULARIA, 209. alba Bull., 114. atra Fr., 152. cribrosa Fr., 150. flavofusca (Ehr.) Fr., 234. hemispherica Bull., 138. lycoperdon Bull., 6, 210. maxima Fr., 154. rozeana Rost., 211. sinuosa Bull., 52. splendens Morg., 211.

Rostafinskia, 182. elegans Racib., 182.

Scyphium. rubiginosum (Chev.) Rost., 70.

Siphotychium, 207. casparyi Rost., 207.

Sphaerocarpus. albus Bull., 97. aurantius Bull., 98. capsulifer Bull., 40. chrysospermus Bull., 272. cylindricus Bull., 206. floriformis Bull., 143. fragilis Sowb., 274. globuliferus Bull., 66. luteus Bull., 98. utricularis Bull., 67. viridis Bull., 98.

Spumaria, 113. alba (Bull.) DC., 114. didermoides (Ach.) Pers., 40. granulata Schum., 57. licheniformis Schw., 78. minuta Schum., 57. mucilago Pers., 114.

STEMONITIS, 156. alba (Bull.) Gmel., 97. argillacea (Pers.) Gmel., 218. axifera (Bull.) Macbr., 168, 169, 171. baeuerlinii Mass. (?), 166. botrytis (Pers.) Gmel., 274. carolinensis Macbr., 170. castillensis Macbr., 162. confluens Cke. & Ell., 158. dictyspora Rost., 161. digitata Schw., 255. fenestrata Rex, 166. ferruginea Ehr., 167, 168, 169. ferruginosa Batsch., 206. flavogenita Jahn, 169. friesiana DBy., 178. fusca (Roth.) Rost., 160, 162. herbatica Peck, 171. leucocephala (Pers.) Gmel., 105. maxima Schw. (?), 160. microspora List., 167. morgani Peck, 164. nigra Pers., 178, 179. nigrescens Rex, 162. ovata nigra Pers., 178. pallida Wing., 169, 170. papillata Pers., 190. pulchella Bab., 183. scintillans Berk. & Br., 142. smithii Macbr., 167. splendens Rost., 164, 174. splendens var. confluens List., 6, 158. suksdorfii Ell. & Ev., 178. tenerrima Berk. & C., 170, 183. tenerrima Curt., 122, 129, 183. trechispora (Berk.) Torr., 159. tubulina Alb. & Schw., 150. typhina Pers., 181. typhina Wig., 130. typhoides (Bull.) DC., 181. uvifera Macbr., 161. varia (Pers.) Gmel., 270. violacea Fr., 196. virginiensis Rex, 163. viridis (Bull.) Gmel., 98. webberi Rex, 163.

TILMADOCHE, 57. alba (Bull.) Macbr., 97. bethelii Macbr., 94. cernua (Schum.) Fr., 97. columbina (Berk. & C.) Rost., 72. compacta Wing., 72. gyrocephala (Mont.) Rost., 95. hians Rost., 109. mutabilis Rost., 98. nutans (Pers.) Rost., 97. oblonga (Berk. & C.) Rost., 71. polycephala (Schw.) Macbr., 95. viridis (Bull.) Sacc., 98.

Tremella, 19. hydnoides Jacq., 19.

Trichamphora, 102. oblonga Berk. & C., 109. pezizoidea Jungh., 102.

TRICHIA, 267. abietina Wig., 261. abrupta Cke., 271. affinis DBy., 271. andersoni Rex, 211. aurea Schum., 104. axifera Bull., 168. botrytis Pers., 274, 277. cernua Schum., 59, 75. chrysosperma (Bull.) Rost., 272. cinerea Bull., 254. circumscissa Wallr., 241. clavata Pers., 264. contorta (Ditm.) Rost., 269. decipiens (Pers.) Macbr., 276. erecta Rex, 276. fallax Pers., 276. favoginea (Batsch) Pers., 272. flagellifera Berk. & Br., 258. fragilis (Sowb.) Rost., 274, 277. inconspicua Rost., 263. iowensis Macbr., 269. jackii Rost., 271. lateritia Lev., 277. leucopodia Bull., 186. nana Mass., 261. nigripes Pers., 270. nitens Lib., 280. nutans Bull., 249. ovata Pers., 261. persimilis Karst., 271. proximella Karst., 271. pulchella Rex, 273. pusilla Schroet., 280. pyriformis Fr., 274. reniformis Peck, 269. rubiformis Pers., 262. scabra Rost., 271. serpula (Scop.) Pers., 260. subfusca Rex, 275. typhoides Bull., 181. varia (Pers.) Rost., 270. verrucosa Berk., 273.

TUBIFERA, 205. casparyi (Rost.) Macbr., 207. ferruginosa (Batsch) Macbr., 206. stipitata (B. & R.) Macbr., 207.

Tubulina, 155. cylindrica (Bull.) DC., 206. fragiformis (Pers.) List., 206. stipitata (Berk. & Rav.) Rost., 207.



PLATES

TO ILLUSTRATE

NORTH AMERICAN SLIME-MOULDS

NOTE.—Plates I., II., IV., VI., VII., VIII., IX., X., were originally by MISS MARY P. MACBRIDE; Plates V., XI., XII., were by MRS. HATTIE J. DOUGLASS; Plates XIII., XIV., XV., XVI., XVII., were by the late MRS. BERTHA E. LINDER PUMPHREY; Plate III. was the joint work of MRS. PUMPHREY and MISS MACBRIDE. All these, except IV., have been re-drawn for new plates; XVI., with additions, by MISS MARGARET HAYES; the remainder by MR. W. J. CALVIN, C. E. Plate XVIII. is by MISS HAYES; Plate XIX. by Miss A. M. HELD; Plate XX. by MISS JANE COVENTRY.

EXPLANATION OF PLATE I

Enteridium splendens Morg., p. 211.

Fig. 1. Aethalium, natural size.

Fig. 1 a. Spore of the same species, x 1400.

Fig. 1 b. Capillitium of the same species, x 420.

Dictydiaethalium plumbeum (Fr.) Rost., p. 215.

Fig. 2. Aethalium, natural size.

Fig. 2 a. Sporangia and spores, x 50 (after Schroeter).

Fig. 2 b. Persistent apices of the peridia.

Lindbladia effusa (Ehr.) Rost., p. 204.

Fig. 3. A group of sporangia, x 30.

Fig. 3 a. A single spore, x 1400.

Tubifera ferruginosa (Batsch) Macbr., p. 206.

Fig. 4. A group of sporangia, x 5.

See also Plate VII., Fig. 8; and Plate XII., Fig. 14.

Cribraria dictydioides Cke. & Balf., p. 222.

Fig. 5. Three sporangia, x 15.

Fig. 5 a. A single sporangium, to show reticulate thickening, x 60.

Fig. 5 b. A spore, x 1400.

Dictydium cancellatum (Batsch) Macbr., p. 230.

Fig. 6. Sporangium, x 30.

Fig. 6 a. A part of the peridial wall, seen from within, x 84.

Ceratiomyxa fruticulosa (Muell.) Macbr., p. 19.

Fig. 7. Three sporiferous pillars, x about 40.

Fig. 7 a. Tip of a single pillar, x 84.

Hemitrichia stipata (Schw.) Macbr., p. 262.

Fig. 8. Sporangia, x 6.

Fig. 8 a. The capillitium of the same species, x 750.

Fig. 8 b. A single spore, x 1000.



EXPLANATION OF PLATE II

Perichaena corticalis (Batsch) Rost., p. 243.

Fig. 1. Sporangia, x 10.

Fig. 1 a. A single spore, as if in section, x 900.

Fig. 1 b. The capillitial thread, x 750.

Lachnobolus occidentalis Macbr., p. 246.

Fig. 2. The sporangia, x 8.

Fig. 2 a. A portion of the capillitium, x 750.

Fig. 2 b. Spores, x 750.

See also 4 and 4 a below.

Arcyria cinerea (Bull.) Pers., p. 254.

Fig. 3. The expanded fructifications, x 5.

Fig. 3 a. Tip of a single capillitium mass, x 40.

Lachnobolus occidentalis Macbr., p. 246.

Fig. 4. A cluster of sporangia, x 3; cylindric type.

Fig. 4 a. Capillitium, x 750; to show characteristic surface of the threads.

Arcyria denudata (Linn.) Pers., p. 253.

Fig. 5. Sporangia, two expanded, one still closed, x 20.

Fig. 5 a. A part of the capillitium of the same species, x 750.

Arcyria nutans (Bull.) Grev., p. 249.

Fig. 6. Expanded capillitium, etc., x 10.

Fig. 6 a. Capillitium, x 750.

Fig. 6 b. A piece of the capillitium thread, x 1400.

Ophiotheca wrightii Berk. & C., p. 241.

Fig. 7. A single sporangium, x 8.

Fig. 7 a. A node of the capillitial thread, x 750.

Fig. 7 b. A spore, x 750.

Oligonema nitens (Lib.) Rost., p. 280.

Fig. 8. A single elater, x 750.

Figs. 8 a and 8 b. Spores, x 1000.

Badhamia macrocarpa Rost., p. 37.

Var. gracilis.

Fig. 9. Two sporangia, x 600.



EXPLANATION OF PLATE III

Hemitrichia clavata (Pers.) Rost., p. 264.

Fig. 1. Three sporangia, one closed, x 8.

Fig. 1 b. A single spore, x 1400.

Hemitrichia vesparium (Batsch) Macbr., p. 262.

Fig. 2. Tip of the elater of capillitial thread, x 1400.

Fig. 2 a. A single spore, x 1400.

Trichia iowensis Macbr., p. 269.

Fig. 3. A cluster of sporangia, x 5.

Fig. 3 a. Tip of a branching elater, x 750.

Fig. 3 b. A single spore, x 750.

See also Plate X., Fig. 5.

Hemitrichia serpula Scop., p. 260.

Fig. 4. A plasmodiocarp, x 3.

Fig. 4 a. A single spore, x 1400.

Fig. 4 b. An elater-tip, x 1400.

Trichia inconspicua Rost., p. 268.

Fig. 5. A cluster of sporangia, x 12.

Fig. 5 a. Tip of an elater, x 1400.

Fig. 5 b. A single spore, x 750.

Physarum oblatum Macbr., p. 91.

Fig. 6. A single sporangium, x 20; stipe shown of unusual length.

Fig. 6 a. A single spore, x 1000.

See also Plate XIV., Fig. 3.

Physarum auriscalpium (Cke.) Lister, p. 90.

Fig. 7. A single sporangium, x 20; a New York specimen.

Fig. 7 a. A single spore, x 1000.

Arcyria nodulosa Macbr., p. 252.

Fig. 8. Capillitial thread, x 1200.



EXPLANATION OF PLATE IV

Trichia persimilis Karst., p. 271.

Fig. 1. Var. intermedia, x about 6.

Fig. 1 a. Spore of same species, x 1400.

Fig. 1 b. A second spore to show varying episporic network.

Fig. 1 c. Tip of elater, shows vertical connecting bands.

Trichia decipiens (Pers.) Macbr., p. 276.

Fig. 2. Sporangia, x about 8.

Fig. 2 a. A spore of the same species, x 1400.

Fig. 2 b and 2 c. Elaters of the same species, x about 225.

Trichia varia (Pers.) Rost., p. 270.

Fig. 3. Sporangia, x about 8.

Fig. 3 a. A spore of the same species, x 1000.

Fig. 3 b. An elater of the same species, x 750.

Trichia scabra Rost., p. 271.

Fig. 4. Sporangia, x about 8.

Fig. 4 a. A single spore of the same species, x 1400.

Fig. 4 b. An elater-tip of the same, x 1400.

Trichia favoginea (Batsch) Pers., p. 272.

Fig. 5. Sporangia, x about 8.

Fig. 5 a. A single spore of the same, x 1400.

Fig. 5 b. A single elater-tip of the same, x 1400.

Trichia persimilis Karst., var abrupta Cke., p. 271.

Fig. 6. An elater-tip, x 1400. It will be noticed that the spirals are connected by vertical bars.

Fig. 6 a. A single spore of the same variety, x 1400.

Fig. 6 b. A single spore, from the same sporangium as 6 a.

Fig. 6 c. Trichia persimilis, a single spore, x 1400.

Fig. 6 d. Tip of an elater from the same, x 1400.



EXPLANATION OF PLATE V

Lamproderma arcyrionema Rost., p. 197.

Fig. 1. A single sporangium seen as if in section, x 40.

Fig. 1 a. A single spore, x 1400.

Lamproderma scintillans (Berk. & Br.) List., p. 195.

Fig. 2. A single sporangium seen as in section, x 40.

Fig. 2 a. A single spore, x 1400.

Enerthenema papillatum (Pers.) Rost., p. 190.

Fig. 3. An expanded, blown-out sporangium, x 25.

Lamproderma robustum Ell. & Ev., p.

Fig. 4. A sporangium seen as in section, x 20.

Fig. 4 a. A single spore, x 1000.

Comatricha laxa Rost., p. 177.

Fig. 5. A sporangium seen as if in section, x 40.

Fig. 5 a. A single spore, x 2000.

Diachaea thomasii Rex, p. 188.

Fig. 6. Three sporangia magnified about 15 times.

Fig. 6 a. A single spore of the same species, x 800.

Brefeldia maxima (Fries) Rost., p. 154.

Fig. 7. A group of sporangia, showing columellae; x 5.

Fig. 7 a. Capillitial threads of the same species, x 300.

Fig. 7 b. Spore of the same species, x 1500.

Amaurochaete fuliginosa (Sowb.) Macbr., p. 149.

Fig. 8. A bit of so-called capillitium, x 300.

Fig. 8 a. A single spore magnified about 1000 times.



EXPLANATION OF PLATE VI

Comatricha typhoides (Bull.) Rost., p. 181.

Fig. 1. A group of sporangia, x 5.

Fig. 1 a. A single spore, x 1600.

Fig. 1 b. Tip of the columella with its branches, x 50.

Comatricha longa Peck, p. 175.

Fig. 2. A single empty sporangium, x 6.

Fig. 2 a. A part of the same taken near the apex, x 60.

Fig. 2 b. A spore, x 1400.

Comatricha aequalis Peck, p. 180.

Fig. 3. A single sporangium, x 10.

Fig. 3 a. The columella and capillitium, x 60.

Fig. 3 b. A single spore, x 1600.

Figs. 3 c and 3 d. Sporangia to which the peridium still adheres, although in 3 c in shreds.

Stemonitis fusca Rost., p. 160.

Fig. 4. A group of sporangia, x 3.

Fig. 4 a. A part of the columella and capillitium, x 60.

Fig. 4 b. A single spore, x 1400.

Stemonitis axifera (Bull.) Macbr., p. 168.

Fig. 5. A group of sporangia, x 3.

Fig. 5 a. A single spore, x 1400.

Fig. 5 b. A part of the capillitium with columella, x 60.

Stemonitis splendens, p. 164.

Fig. 6. A group of sporangia, x 3.

Figs. 6 a and 6 c. Single spores, the latter x 1400.

Fig. 6 b. A part of the columella and branches, x 60.

Fig. 7. A shorter variety of the same species with coarser meshes in capillitium, x 3.

Fig. 7 a. A part of the columella and net, x 60.



EXPLANATION OF PLATE VII

Diachaea splendens Peck, p. 187.

Fig. 1. Sporangia and hypothallus, x 25.

Fig. 1 a. Capillitium, x 50.

Fig. 1 b. Spores, x 900.

Fig. 1 c. Portion of the capillitium, x 150.

Didymium nigripes Fr., p. 123.

Fig. 2. Sporangia, x 30.

Fig. 2 a. A spore, x 1400.

Fig. 2 b. Calcareous crystals from the peridial wall, x 750.

Didymium melanospermum (Pers.) Macbr., p. 121.

Fig. 3. Sporangia, x 10.

Fig. 3 a. A single spore, x about 1000.

Diderma testaceum (Schrad.) Pers., p. 137.

Fig. 4. Sporangia; the first exhibiting the two peridial walls and the spore-mass, x 10.

Fig. 4 a. Spore, x 750.

Fig. 4 b. Capillitial threads, x 750.

Diderma globosum Pers., p. 134.

Fig. 5. Sporangia; the first with the outer peridium broken away, x 10.

Fig. 5 a. A single spore, x 750.

Mucilago spongiosa (Leyss.) Morg., p. 114.

Fig. 6. An aethalium, borne on a grass-stem, natural size.

Fig. 6 a. A spore, x 750.

Fig. 6 b. Capillitium, with surface calcareous crystals, x 750.

Diderma crustaceum Peck, p. 135.

Fig. 7. A mass of clustered sporangia, to show habit of aggregation, natural size.

Tubifera ferruginosa (Batsch) Macbr., p. 206.

Fig. 8. A single spore, x 1400.



EXPLANATION OF PLATE VIII

Diderma floriforme (Bull.) Pers., p. 143.

Fig. 1. Sporangia of various ages, x 5.

Fig. 1 a. Spore of the same species, x 1000.

Fig. 1 b. A capillitial thread, x 1000.

Physarum polycephalum Schw., p. 95.

Fig. 2. The sporangia, x 10.

Fig. 2 a. Spores, x 750.

Fig. 2 b. Capillitium, x 750.

Leocarpus fragilis (Dicks.) Rost., p. 112.

Fig. 3. Sporangia, x 6.

Fig. 3 a. A group of sporangia, natural size, to show habit.

Fig. 3 b. A single spore, x 1800.

Physarella oblonga (Berk. & C.) Morg., p. 109.

Fig. 4. A single sporangium, x 8.

Figs. 4 a and 4 b. Capillitium and spore respectively, x 900.

Craterium leucocephalum (Pers.) Ditmar, p. 105.

Fig. 5. Sporangia, the first closed, x 10.

Physarum sinuosum (Bull.) Weinm., p. 52.

Fig. 6. Plasmodiocarp, natural size; 6 a, x 4; see also Plate XIX., Fig. 15.

Physarum virescens Ditmar, p. 61.

Fig. 7. Groups of sporangia, x 3 and x 8.

Fig. 7 a. Spores, x 750.

Physarum viride Pers., p. 98.

Fig. 8. A single sporangium, x 25; 8 a, reverse.

Fig. 8 b. The same after spore-dispersal.

Fig. 8 c. Capillitium, x 750.



EXPLANATION OF PLATE IX

Physarum didermoides (Ach.) Rost., p. 78.

Fig. 1. Sporangia, x 15.

Fig. 1 a. A single sporangium open; shows calcareous capillitium, x 15.

Fig. 1 b. Spores, x 900.

Physarum notabile Macbr., p. 80.

Fig. 2. A cluster of sporangia, x 15.

Fig. 2 a. A single sporangium open, x 15.

Fig. 2 b. Spores, x 900.

See also Plate XV., Figs. 2, 2 a, and the frontispiece.

Physarum contextum Pers., p. 56.

Fig. 3. A group of sporangia, x 15.

Fig. 3 a. Spores of the same, x 600.

Physarum cinereum (Batsch) Pers., p. 59.

Fig. 4. A group of sporangia, x 4.

Fig. 4 a. A single sporangium, x 20.

Fig. 4 b. Capillitium of the same, x 240.

Fig. 4 c. Spores, x 450.

Physarum albescens Ellis, p. 86.

Fig. 5. Sporangia, x 5.

See also Plate XVI., Figs. 4 and 4 a.

Fig. 5 a. Spore of the same species, x 450.

Fig. 5 b. Capillitium of the same, x 240.

Physarum serpula Morg., p. 49.

Fig. 6. Plasmodiocarps, about natural size.

Fig. 6 a. A bit of the plasmodiocarp, showing structure, x 6.

Fig. 6 b. A spore of the same species, x 1400.

Physarum leucopus Link., p. 79.

Fig. 7. A single sporangium, x 15.

Fig. 7 a. A spore of the same species, x 900.

Fig. 7 b. A fragment of the capillitium.



EXPLANATION OF PLATE X

Badhamia rubiginosa (Chev.) Rost., p. 43.

Fig. 1. A group of sporangia, x 5.

Fig. 1 a. Two sporangia, same species, x 18, to show persisting capillitium.

Fig. 1 b. Capillitium fragment, x 240.

Fig. 1 c. Spore of the same species, x 750.

Fuligo septica (L.) Gmel.; form laevis, p. 29.

Fig. 2. An aethalium, natural size.

Fig. 2 a. A section of the same, x 10.

Fig. 2 b. A spore of the same, x 750.

Fuligo cinerea Pers., p. 26.

Fig. 3. A small aethalium borne upon a blade of grass, natural size.

See also Plate XXIII.

Fig. 3 a. Capillitial fragment from the same specimen, x 450.

Fig. 3 b. Spores of the same, x about 750.

Didymium minus List., p. 121.

Fig. 4. A single sporangium, x 25.

Fig. 4 a. The capillitium and fragment of the peridium of the same species, x 380.

Fig. 4 b. A spore of the same species, x 1000.

Trichia iowensis Macbr., p. 269.

Fig. 5. Tip of an elater, x 1400.

See also Plate III, 3, 3 a, 3 b.

Badhamia papaveracea Berk. & Rav., p. 42.

Fig. 6. Sporangia, a cluster, x 8.

Fig. 6 a. A cluster of spores, x 400.

Fig. 6 b. A single spore of the same, x 1400.

Reticularia lycoperdon Bull., p. 210.

Fig. 7. A fragment of the capillitium, x 240.

Fig. 7 a. A single spore of the same species, x 1400.

See also Plate XII., Fig. 3.



EXPLANATION OF PLATE XI

Comatricha nigra Pers., p. 178.

Fig. 1. A group of sporangia, x 10.

Fig. 2. A single sporangium as in section, x 60.

Fig. 3. A single spore, x 1600.

Stemonitis confluens Ell. & Cke., p. 158.

Fig. 4. A group of sporangia, x 10.

Fig. 4 a. A thread of capillitium with adhering disk, x 30.

Fig. 5. A spore of the same, x 2000.

Stemonitis webberi Rex, p. 163.

Fig. 6. A group of sporangia, x 4.

Fig. 7. A single sporangium as in section, x 40.

Fig. 8. A single spore, same species, x 1250.

Comatricha suksdorfii Ell. & Ev., p. 178.

Fig. 9. A group of sporangia, x 4.

Fig. 10. A bit of the capillitium, x 60.

Fig. 11. A single spore, x 1600.

Comatricha caespitosa Sturg., p. 172.

Fig. 12. A cluster of sporangia, x 4.

Fig. 13. The capillitium highly magnified.

Fig. 14. A single spore, x 1600.



EXPLANATION OF PLATE XII

Lindbladia effusa (Ehr.) Rost., p. 204.

Fig. 1. Fructification, natural size.

Fig. 2. Portion of same in section, x 3.

Reticularia lycoperdon Bull., p. 210.

Fig. 3. Residual capillitial structure, the spores blown away; about natural size.

Enteridium splendens Morg., p. 211.

Fig. 4. Fructification, a large one, natural size.

Fig. 5. Same in section, x 3.

Arcyria ferruginea Sauter, p. 253.

Fig. 6. Three sporangia, magnified about 10 times.

Fig. 6 a. A single spore, magnified.

Fig. 6 b. Capillitial thread.

Licea variabilis Schrad., p. 200.

Fig. 7. Sporangia, magnified about 6 times.

Fig. 8. Spore, magnified to show surface characters.

Tubifera casparyi (Rost.) Macbr., p. 207.

Fig. 9. A group of sporangia; shows the pseudo-columellae; x about 5.

Licea biforis Morg., p. 201.

Fig. 10. Sporangia dehiscent, magnified about 10 times.

Orcadella operculata Wing., p. 203.

Fig. 11. Sporangia, magnified about 30 times.

Cribraria argillacea Pers., p. 218.

Fig. 12. Sporangia, magnified about 10 times.

Fig. 13. A single sporangium, x about 40.

See also Plate XVII., Fig. 1.

Tubifera ferruginosa (Batsch) Macbr., p. 206.

Fig. 14. Sporangia magnified to show apiculate tops. Cf.

Comatricha ellisii Morg., p. 184.

Fig. 15. Sporangium, x 40.

Fig. 15 a. A single spore, x 1000.

Comatricha pulchella (Bab.) Rost, p. 183; vid. p. 284.

Fig. 16. Sporangium, x 20.

Fig. 16 a. A single spore, x 1000.

Comatricha subcaespitosa Peck, p. 185.

Fig. 17. Sporangium, x 20.

Fig. 17 a. A single spore, x 1000.

Comatricha gracilis Wingate, p. 183.

Fig. 18. Sporangium, x 20.

Fig. 18 a. A single spore, x 1000.



EXPLANATION OF PLATE XIII

Heterotrichia gabriellae Mass., p. 257.

Fig. 1. A group of sporangia, one expanded, the others empty, x 15.

Fig. 1 a. Capillitium of the species, x 600.

Calonema aureum Morg., p. 266.

Fig. 2. A cluster of sporangia, magnified about 15 times.

Fig. 2 a. The tip of an elater of the same species, x 1000.

Fig. 2 b. A single spore, x 1000.

Fig. 2 c. A bit of the sporangium wall, x 600.

Stemonitis pallida Wing., p. 169.

Fig. 3. Sporangia, magnified about 5 times.

Comatricha pulchella (Bab.) Rost., form C. persoonii R., p. 183.

Fig. 4. Sporangia, magnified about 15 times.

See Addenda, d, p. 283.

Stemonitis carolinensis Macbr., p. 170.

Fig. 5. Sporangia, magnified about 5 times.

Clastoderma debaryanum Blytt., p. 191.

Fig. 6. Sporangium, magnified about 60 times.

Trichia contorta Rost., p. 269.

Fig. 7. Tip of an elater, x 1400.

Fig. 7 a. Spore of the same species, x 1400.

Trichia botrytis Pers., p. 274.

Fig. 8. Tip of the elater, x 1400.

Fig. 8 a. Spore of the same species, x 1400.



EXPLANATION OF PLATE XIV

Badhamia magna Peck., p. 38.

Fig. 1. A cluster, of sporangia, x 10.

Cienkowskia reticulata (Alb. & Schw.) Rost., p. 111.

Fig. 2. Plasmodiocarp, x 15.

Fig. 2 a. A bit of the capillitium of the same, x 800.

Fig. 2 b. A single spore, x 1000.

Physarum oblatum Macbr., p. 91.

Fig. 3. Sporangia, x 15.

Fig. 3 a. A piece of capillitium, x 800.

Fig. 3 b. A single spore, x 1000. The roughness much exaggerated.

Badhamia orbiculata Rex., p. 37.

Fig. 4. A group of sporangia, x 10.

Physarum newtoni Macbr., p. 73.

Fig. 5. A group of sporangia, x 16.

Fig. 5 a. A single spore, x 1000.

Fig. 5 b. A bit of the capillitium, x 800.

Physarum maculatum Macbr., p. 77.

Fig. 6. A cluster of sporangia, x 10.

Fig. 6 a. A piece of the capillitial net, x 800.

Fig. 6 b. A single spore, x 800.

Lepidoderma tigrinum (Schrad.) Rost., p. 145.

Fig. 7. A group of sporangia, x 20.



EXPLANATION OF PLATE XV

Physarum confertum Macbr. n. n., p. 64.

Fig. 1. Sporangia on a bit of leaf, x 4.

Fig. 1 a. Capillitium, x 800.

Fig. 1 b. A single spore, x 1200.

Physarum notabile Macbr., p. 80.

Fig. 2. A group of sporangia, stipitate form, x 10.

Fig. 2 a. A single spore, x 1200.

Physarum flavicomum Berk., p. 93.

Fig. 3. A cluster of sporangia, one closed, x 10.

Fig. 3 a. A single spore, x 1200.

Physarum tropicale Macbr., p. 82.

Fig. 4. Sporangia, x 10.

Fig. 4 a. Capillitium, x 800.

Fig. 4 b. A single spore, x 1200.

Craterium minutum (Leers) Fr., p. 107.

Fig. 5. Sporangia, the stalks unusually long, x 15.

Physarum penetrale Rex, p. 70.

Fig. 6. A group of sporangia; the calcareous crust has fallen in all.

Fig. 6 a. A single sporangia, enlarged to show columella, x 20.

Physarum nicaraguense Macbr., p. 83.

Fig. 7. A group of sporangia, x 15.

Fig. 7 a. Capillitium, strongly calcareous, x 800.

Fig. 7 b. A single spore, x 1200.

See also Pl. XVII., Figs 11 and 11 a.



EXPLANATION OF PLATE XVI

Physarella oblonga (Berk. & C.) Morgan, p. 109.

Fig. 1. Fully opened sporangium, x 10.

Fig. 1 a. Tubular sporangia closed, x 5.

Fig. 1 b. Transverse section of sporangium; shows trabecular calcareous nodules of the capillitium, x 15.

Craterium cylindricum Mass., p. 106.

Fig. 2. Group of sporangia, x 10.

Physarum wingatense Macbr., p. 72.

Fig. 3. Group of sporangia, x 10.

Physarum albescens Ellis, p. 86.

Fig. 4. Group of sporangia, x 10.

Fig. 4 a. Capillitium of the same species, x 200.

Dianema harveyi Rex, p. 238.

Fig. 5. Group of sporangia, x 10.

Fig. 5 a. Clustered spores, D. corticatum, x 500.

Fig. 5 b. Capillitial threads and spores, D. harveyi, x 200.

Fig. 5 c. Twisted, spirally striate single threads, x 500; D. corticatum, List.

Physarella oblonga Berk. & C., p. 109.

Fig. 6. Terrestial, plasmodiocarpous phase, x 10.

Physarum megalosporum Sturg., p. 63.

Fig. 7. Group of sporangia, x 8.

Fig. 7 a. Capillitium and spores, x 150.

Didymium complanatum (Batsch) Rost., p. 116.

Fig. 8. Capillitial structure, x 200.

Physarum wingatense, p. 72.

Fig. 9. Sporangium, x 20, enlarged to show dehiscence.

Didymium xanthopus (Ditm.) Fr., p. 123.

Fig. 10. Sporangium—diagram to show columella, x 20.

Didymium eximium Pk., p. 124.

Fig. 11. Group of sporangia, x 10.

Fig. 11 a. Section of sporangium, x 30; diagram.

Fig. 11 b. Spore, x 750.

Comatricha elegans (Racib.) List., p. 182.

Fig. 12. A single sporangium, x 20.

Clastoderma debaryanum, p. 191.

Fig. 13. Sporangium, seen in section, x 20.

Stemonitis herbatica Pk., p. 171.

Fig. 14. Group of sporangia, x 2.

Fig. 14 a. The same enlarged to show general outline.

Fig. 14 b. The same; capillitial section, x 20.

Fig. 14 c. A single spore, x 1000.



EXPLANATION OF PLATE XVII

Cribraria argillacea (Pers.) Schrad., p. 218.

Fig. 1. Sporangium, highly magnified.

Cribraria macrocarpa Schrad., p. 219.

Fig. 2. Sporangium, highly magnified.

Cribraria aurantiaca Schrad., p. 221.

Fig. 3. Sporangium containing spores, x 30.

Cribraria microcarpa Schrad., p. 226.

Fig. 4. Sporangium containing spores, x 30.

Cribraria tenella Schrad., p. 225.

Fig. 5. Sporangium containing spores, x 40.

Cribraria minutissima Schw., p. 220.

Fig. 6. A single sporangium calyculate, x 50.

Fig. 6 a. A smaller sporangium without calyx, with spore-mass.

Cribraria cuprea Morg., p. 229.

Fig. 7. A single sporangium, x 50.

Cribraria violacea Rex, p. 227.

Fig. 8. A single sporangium, x 40.

Cribraria piriformis Schrad., p. 224.

Fig. 9. A single sporangium, x 30.

Perichaena depressa (Libert) Rost., p. 242.

Fig. 10. A cluster of sporangia, one open, x 8.

Physarum nicaraguense Macbr., p. 83.

Fig. 11. Single sporangium, x 10.

Fig. 11 a. A cluster of sporangia and hypothallus, x 5.



EXPLANATION OF PLATE XVIII

Margarita metallica (Berk. & Br.) List., p. 237.

Fig. 1. A group of sporangia, x 15.

Fig. 1 a. Capillitium and spores, x 300.

Fig. 1 b. A single spore, x 1200.

Diderma cor-rubrum n. s., p. 140.

Fig. 2. A group of sporangia, x 15.

Diderma asteroides List., p. 143.

Fig. 3. Sporangia-spread, x 6.

Fig. 3 a. Same sporangia still unopened, x 4.

Comatricha laxa Rost., Cf. Pl. V., 5 & 5 a, p. 184.

Fig. 4. Sporangia, x 10.

Diderma lyallii (Mass.) Macbr., p. 136.

Fig. 5. A group of sporangia, x 10.

Fig. 5 a. Capillitium and spores, x 200.

Lepidoderma chailletii Rost., p. 146.

Fig. 6. A group of sporangia, x 15.

Fig. 6 a. Capillitium and spores, x 150.

Fig. 6 b. A single spore, x 800.

Didymium anellus Morg., p. 117.

Fig. 7. A group of sporangia, x 10.

Diderma radiatum Linn., p. 141.

Fig. 8. A group of sporangia, x 8.

Physarum diderma Rost., p. 55.

Fig. 9. A group of sporangia, x 10.

Diderma rugosum (Rex) Macbr., p. 144.

Fig. 10. A group of sporangia, x 10.

Diderma niveum (Rost.) Macbr., p. 137.

Fig. 11. A group of sporangia, x 10.

Fig. 11 a. Spore and Capillitium, x 600.

Prototrichia metallica (Berk.) Mass., p. 258.

Fig. 12. A group of sporangia, x 10.

Fig. 12 a. Same; capillitium and spores, x 300.

Fig. 12 b. Tip of a capillitium thread to show spiral markings and end-fraying, x 800.

Comatricha aequalis Peck, p. 180.

Fig. 13. A group of sporangia, x 5.

Fig. 13 a. Sporangium tip, capillitium, x 200.

Fig. 13 b. Spore, x 800.

Physarum compressum Alb. & Schw., p. 80.

Fig. 14. A group of sporangia to show compressed form, x 10.

See also Plate XIX., Fig. 12.



EXPLANATION OF PLATE XIX

Dictydium cancellatum Batsch, p. 230.

Fig. 1. The finest phase, as the form appears in the Mississippi valley, x 15.

Fig. 1 a. Sporangium of the same seen from below, x 35.

Fig. 1 b. Sporangium—same—seen from above, x 35.

Fig. 1 c. Cribraria-like net from the top, x 200.

Fig. 2. Vertical section of what is believed the typical European form, x 20.

Fig. 3. An ellipsoidal piriform phase—var. prolatum, x 15.

Physarum compressum Alb. & Schw. form P. affine Rost., p. 80.

Fig. 4. A group of sporangia, x 12.

Fig. 4 a. A single spore, x 600.

Fig. 4 b. Capillitium, same species, x 300.

Alwisia bombarda Berk. & Br., p. 209.

Fig. 5. Open sporangia, x 6.

Fig. 5 a. Sporangium of same enlarged to show capillitium, x 20.

Cribraria dictydiodes Cke. & Balf., p. 222.

Fig. 6. A group of sporangia, x 6.

Fig. 6 a. Single sporangium of same—lateral view, x 25.

Fig. 6 b. Same; base view, x 30.

Cribraria aurantiaca Schrad., p. 221.

Fig. 7. Single sporangium, x 30.

Cribraria rufa (Roth) Rost., p. 220.

Fig. 8. Sporangium, x 30.

Cribraria piriformis Schrad., p. 224.

Fig. 9. Sporangium, x 30.

Cribraria splendens (Schrad.) Pers., p. 221.

Fig. 10. Sporangium, x 30.

Echinostelium minutum DeBy., p. 198.

Fig. 11. Several sporangia, x 15.

Fig. 11 a. Vertical section, after Rost., x 500.

Physarum compressum Schw., p. 80.

Fig. 12. Sporangium, x 20, to show dehiscence.

Didymium anomalum Sturg., p. 127.

Fig. 13. Plasmodiocarps, about natural size.

Fig. 13 a. Diagrammatic vertical section, etc., to show the calciferous pillars distinguishing the species, x 200.

Fig. 14. Calcic crystal—enlarged.

Physarum sinuosum (Bull.) Weinm., p. 52.

Fig. 15. Plasmodiocarps passing to sporangia, x 5.

Cf. Plate VIII., 6 and 6 a.

Physarum bitectum List., p. 53.

Fig. 16. Plasmodiocarps as in 15, showing transitional phases, x 10.



EXPLANATION OF PLATE XX

Badhamia iowensis n. s., p. 36.

Fig. 1. Sporangia several presentations, x 15.

Fig. 1 a. Capillitium, x 200.

Fig. 1 b. Single spore, x 500.

Physarum mortoni n. s., p. 58.

Fig. 2. A group of sporangia, x 20.

Fig. 2 a. Capillitium, x 200.

Physarum discoidale n. s., p. 74.

Fig. 3. A group of sporangia, x 10.

Fig. 3 a. A single spore, x 800.

Didymium annulatum n. s., p. 125.

Fig. 4. Group of sporangia, x 15.

Fig. 4 a. Capillitium and spores, x 200.

Oligonema brevifilum Peck, p. 280.

Fig. 5. Capillitium, x 800.

Fig. 5 a. The same.

Fig. 12 b. A single spore, x 800.

Amaurochaete tubulina (Alb. & Schw.) Macbr., p. 150.

Fig. 6. Capillitium and spores, x 200.

Fig. 6 a. Spore, x 1200.

Physarum brunneolum (Phill.) Mass., p. 58.

Fig. 7. Group of sporangia.

Fig. 7 a. The same, mature, dehiscence beginning, x 10.

Fig. 7 b. A single spore, x 800.

Stemonitis uvifera n. s., p. 161.

Fig. 8. Colony, natural size.

Fig. 8 a. Capillitium and spore-clusters, x 30.

Fig. 8 b. Single spore-cluster, x 600.

Fig. 8 c. Spore, x 1000.

Stemonitis trechispora Berk., p. 160.

Fig. 9. Fructification—natural size.

Fig. 9 a. Capillitium, branch and threads, x 20—the spores enlarged.

Fig. 9 b. Netted spore, x 1000. Masking as an amaurochete; A. trechispora perhaps; compare 11, etc., below.

Stemonitis flavogenita Jahn, p. 169.

Fig. 10. A group of sporangia, x 3.

Fig. 10 a. Capillitium showing columella-tip, x 50.

Fig. 10 b. Spore, x 1200.

Stemonitis trechispora (Berk.) Torr., p. 159.

Fig. 11. A group of sporangia, x 3.

Fig. 11 a. Diagram of a single sporangium, a less rudimentary specimen, x 40.

Fig. 11 b. Capillitium enlarged to show branching columella, x 40.

Fig. 11 c. A single spore, x 1200.

Arcyria pomiformis (Leers) Rost., p. 255.

Fig. 12. A globose colony of sporangia, x 10; var. conglobosa.

Fig. 12 b. See under 5, above.



EXPLANATION OF PLATE XXI

Brefeldia maxima (Fr.) Rost., p. 154.

A typical, beautiful aethalium, about natural size.



EXPLANATION OF PLATE XXII

Brefeldia maxima Rost., p. 154.

Fig. 1. Plasmodium active; climbing the stump.

Fig. 2. Same plasmodium urgent; moving at the rate of 2 cm. per hour.

From photo-prints by Mr. W. A. Seaman and Mr. John T. Reeder, Mich. The figures are about one-sixth the natural size of the object. See plate preceding for the mature phase of this species, natural size.



EXPLANATION OF PLATE XXIII

Fuligo rufa (Schw.) Pers., p. 28.

1. The plasmodium; urgent!

2. The perfected fruit; quiescent.

The figures present their objects about natural size. See also Plate X., Figs. 3, 3 a, 3 b, for further illustration.

From photo-prints by John T. Reeder, Mich.



* * * * * *



Transcriber's note:

Many apparent spelling errors are in fact published synonyms and remain as printed.

The 'Corrigenda' or errata changes are entered.

Page 11. 'of enviroment.' changed 'enviroment' to 'environment.' Page 26 'anon winding,' may be 'and winding,'; unchanged. Page 29 'PLATE X, Figs. 2, 2 a, 2 b.' added. Page 38 '1892. Bahamia varia' as in original; no change. Page 41 'In some case' changed 'case' to 'cases'. Page 46 'leaving his sucessors' as in original; unusual spelling; no change. Page 47 '24. P. pulcherrinum' changed 'pulcherrinum' to 'pulcherrimum', to match the referenced paragraph. Page 63 'visible hyphothallus' changed 'hyphothallus' to 'hypothallus'. Page 65 '1873. Dydymium' as in original; no change. Page 78 'sheet-like hyphothallus' changed 'hyphothallus' to 'hypothallus'. Page 79 37. Physarum leucopus Link. '37.' missing in original; added. Page 80 'P. affie Rost., Plate XIX., Fig. 4.' changed 'affie' to 'affine'. Page 84 'which has spores 10-12' changed to 'which has spores 10-12 mu'. added ' mu'. Page 98 'PLATE VIII, Figs. 8, 8 a, 8 b.' added. Page 108 'pendunculatum Trent.,' changed 'pendunculatum' to 'pedunculatum'. Page 110 'Cienkowskia Rost.' changed to '6. Cienkowskia Rost.' '6.' added. Page 114 'PLATE VII, Figs. 6, 6 a, 6 b.' added. Page 116 a. Sporangia discoid, spores reticulate 19. D. intermedium b. Stipe, columella, peridium, orange-brown 20. D. leoninum changed to a. Sporangia discoid, spores reticulate 18. D. intermedium b. Stipe, columella, peridium, orange-brown 19. D. leoninum to match referenced text. Page 130 '7. D. niveum' changed '7.' to '8.' Page 149 'cushion is interestingly aborescent' changed 'aborescent' to 'arborescent'. Page 150 AMAUROCHAETE TUBULINA (Alb. & Schw.) Macbr. '2.' added. Page 200 '3. L. biforis. '4. L. minima'. '5. L. pusilla'. changed '3, 4, 5' to '2, 3, 4' respectively to match referenced text. Page 212 'name to ertain English' changed 'ertain' to 'certain'. Page 218 'granules on the calcyulus' changed 'calcyulus' to 'calyculus'. Page 237 'Prototrichia to the Trichiacae.' changed 'Trichiacae' to 'Trichiaceae'. Page 237 Plate XVII., Figs.—— changed 'Figs.——' to 'Figs. 1, 1 a, 1 b'. Page 238 'adjoining the Perichaenacae' as in original. This is probably 'Perichaenaceae', as elsewhere in this book, however, it is in a quotation so is unchanged. Page 241 2. 'Ophiotheca chrysoperma Currey.' changed 'chrysoperma' to 'chrysosperma'. Page 262 'often, to circumscissle' changed 'circumscissle' to 'circumscissile'. Page 262 'to be uniformily distinctly warted' changed 'uniformily' to 'uniformly'. Page 263 'evanescent peridium suggests Arycria' changed 'Arycria' to 'Arcyria'. Page 265 'In typical spcimens' changed 'spcimens' to 'specimens'. Page 269 3. Trichia iowenis Macbr. Changed 'iowenis' to 'iowensis'. Page 289 '[Greek: klaotos]' changed to '[Greek: klastos]. Page 289 '[Greek: echiuos]' changed to '[Greek: echinos]'. Page 290 '[Greek: lanchos]' changed to '[Greek: lachnos]'. Page 290 LEPIDODERMA, 144 [Greek: lepis], a scale, and [Greek: 'depma'], a covering. Gr. changed 'depma' to 'derma'. Page 290 '[Greek: gala], a, milk. Gr.' changed to '[Greek: gala], milk. Gr.'. Removed 'a,'. Page 290 '[Greek: ophix]' unchanged. Maybe '[Greek: tricha]' would be more appropriate. Page 292 'Diachafa 185' changed to 'Diachaea 185' to match the referenced page. Page 297 'pulchripes Peck, 69.' changed to 'pulcherripes Peck, 69.' to match the referenced page. Page 304 Badhamia macrocarpa Rost., p. 7. 'changed p. 7.' to 'p. 37.' Page 324 Comatricha subcaespitosa Peck, p. 282. changed 'p. 282' to 'p. 185'. Page 324 Comatricha gracilis Wingate, p. 184. changed 'p. 184.' to 'p. 183'. Page 328 Badhamia orbiculata Rex., p. 66. changed 'p. 66.' to 'p. 37.' Page 338 'showing transional phases' changed 'transional to 'transitional'. Various pages Inconsistent hyphenation: flavo-fusca flavofusca flavo-fuscum flavofuscum net-work network wide-spread widespread

THE END