352 A Monograph of the Myxogastres. 



Fio. 205. Hcterotrichia Gabriellae, Mass., two entire specimens : a, before, 

 b, after (ieliiscence,^ and showing the protruded capillitiiim, 

 X 80. 



„ 206. Spores and portion of capillitiura 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. Dklymimn ^teglednm, Mass., section of sporan^dum ; a, colu- 

 mella ; b, wall of sporangium covered externally with minute 

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



„ 208. Dldymmm australis, Mass., single specimen showing the shallow 

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



„ 209, Echinostellnni minutmn, Rost., portion of capillitium. (After 

 Rostatinski.) 



,, 210. Physarum conglomeratnm, 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. 



FlQ. 213. Crateriimi cylindricnm, Mass., x 100. 



214. PInjsmmm ellipsospurum, Rost., spore, x 1200. 



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

 specimen by Fries). 



216. Gwndrioderma 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. Physarum brunneolnm, Phil., two entire specimens ; a, before, 

 b, after dehiscence, x 100. 



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

 capillitium, x 300. 



223. Lejyidoderma stellafa, 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, b, after dehiscence, which 

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



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



226. Didymium longlpes, Mass., three specimens, showing irregular 

 mode of dehiscence ; a, hypothallus, x lOO. 



227. Didymium proximum, 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 olf, x 100. 



