Description of the Figures. 351 



FIG. 181. Two spores of same, showing the extreme variations of markings ; 



a, having the bands all united to form a network ; b, having 



the bands not at all combined, x 1200. 

 182. Portion of an elater of same, x 1200. 

 183. Trichia purpurascens, Nyl., plants, x 40. 

 184. Spores and elaters of same, x 350 ; portion of a spore, x 1200. 

 185. Oligonema Broamei, Mass., plants, x 40. 

 186. Spores and elater of same, x 350. 

 187. Leocarpus fragttis, Host., plants, x 25. 

 188. Pale-coloured form of same, x 25. 

 189. Portion of capillitium and spores of same, x 350 ; portion of a 



spore, x 1200. 



190. Fuligo varians, Eost., a small specimen ; nat. size. 

 191. Section of same ; nat. size. 



192. Portion of capillitium and spores of same, x 350. 

 193. Oligonema nitens, Rost., group of plants, x 40. 

 194. Portion of capillitium of same, x 350. 

 195. Spore of same, x 1200. 



PLATE 8. 



FIG. 196. Physarum tenerum, Rex., x 100. 



197. Ophiotheca Wrightii, Berk, and Curtis ; portion of capillitium 

 thread, x 1200. 



198. Ophiotheca vermicularis, Mass., portion of capillitium thread, 

 x 1230. 



198a. Spore of same, x 1200. 



199. Ophiotheca reticulata, Mass., group of specimens showing various 

 forms of the venulose plasmodiocarp, x 50. 



200. Portion of same showing the numerous free arms, a, a, of the 

 capillitium, and the attachment of the latter to the wall of the 

 sporangium, b, x 600. 



201. Orcadella opercidata, Wingate ; two entire specimens ; a, the 

 deciduous operculum, x 100. 



202. Lamproderma Listeri, Mass. , showing a specimen after the dis- 

 appearance of the sporangial wall, and the dispersion of the 

 spores ; a, stem, passing into the hypothallus, b ; c, remains of 

 tne wall of the sporangium, which forms a frill round the apex 

 of the stem ; d, columella, which in the present specimen is 

 expanded in an irregularly discoid manner at the apex ; e, 

 threads of the capillitium which originate from the discoid 

 apex of the columella, x 400. 



203. Spore of same, x 1200. 



204. Lachnobol-xs globosus, .Schweinitz. A specimen growing on a 

 spine of the involucre of the sweet chestnut ; a, the basal per- 

 manent portion of the sporangium, x 100. 



