8 RESEARCHES ON FUNGI 



of C. curtus never produces clamp-connexions — the outward and 

 visible sign in most Hymenomycetes of the paired condition of the 



Fig. 4. — Coprinus curtus. The same pure culture as that sliown in Fig. 3, but 

 about an hour later. The fruit-bodies are I'apidly expanding their pilei and 

 are about to discharge their spores. The gills are splitting down their median 

 planes, thus causing the pileus to become radially rimose. The scales on the 

 pileus, which covxld be seen in the original photograph as small and colourless 

 particles, are here invisible. Photographed at Cornell University by the late 

 G. F. Atkinson, to whom the author sent the culture. Natural size. 



nuclei in each cell — for a final decision whether individual strains 

 of C. curtus are bisexual or quadrisexual we shall have to rely upon 

 cytological methods which still remain to be applied to the problem. 

 The fruit-bodies shown in Figs. 3-6 were produced from a 

 polysporous sowing on horse-dung balls which had been sterilised 



