352 A Monograph of the Myxogastres. 



FIG. 205. Heterotrichia Gabriellae, Mass., two entire specimens : o, before, 

 6, after deliiscence, and showing the protruded capillitium, 

 x 80. 



206. Spores and portion of capillitium of same ; a, thin inner portion 

 of capillitium without free ends ; b, thick, peripheral portion 

 of capillitium with numerous, pointed, free ends, x 500. 



207. Didymium neglectiim, Mass., section of sporangium ; a, colu- 

 mella ; 6, wall of sporangium covered externally with minute 

 granules of lime ; c, threads of capillitium, x 200. 



208. Didymium amtrcdis, Mass., single specimen showing the shallow 

 umbilicus on the under surface of the sporangium, x 100. 



209. Echinostdinm minutum, Host., portion of capillitium. (After 

 Eostafinski.) 



210. Physarum conglomeratum, Fries, a group of specimens seen from 

 above, x 100. (Drawn from a specimen named by Fries.) 



,, 211. Section of a sporangium of same, x 150. 



,, 212. Spores and a portion of the capillitium of the same, x 400. 



PLATE 9. 



Fia. 213. Craterium cylindricum, Mass., x 100. 



214. Physamm dlipsosporum, Host., spore, x 1200. 



215. Physarum flavum, Fries, entire specimen, x 100 (figured from 

 specimen by Fries). 



216. Chondrioderma virginea, Mass., two specimens showing the 

 smooth wall and irregular mode of dehiscence, x 80. 



217. Clusters of the same growing on a dead leaf ; nat. size. 



218. Spore of same, x 1200. 



219. Section of a sporangium of same, showing columella and capil- 

 litium, x 100. 



220. Portion of capillitium and spores of same, x 400. 



221. Physamm brunneolum, Phil., two entire specimens ; o, before, 

 6, after dehiscence, x 100. 



222. Section of same, showing the very numerous, large nodes of the 

 capillitium, x 300. 



223. Lepidoderma stellata, Mass., young specimen, showing the origin- 

 ally continuous white crust of bicarbonate lime just beginning 

 to break up into large, detached, persistent patches, x 150. 



224. Two specimens of same ; a, before, 6, after dehiscence, which 

 takes place in a stellate manner from the apex, x 150. 



225. Section of same, showing the columella and capillitium, x 150. 



226. Didyminm Iwiqipes, Mass., three specimens, showing irregular 

 mode of dehiscence ; a, hypothallus, x 100. 



227. Didymium proximnm, Berk, and Curt., specimens growing on 

 dead grass ; nat. size. 



228. Two specimens of same ; a, showing the elongated columella, 

 which is very brittle and easily broken off, x 100. 



