324 RESEARCHES ON FUNGI 



in the course of a few hours, raises the pileus from the surface of the 

 substratum to its maximum height. Just as the stipe is ceasing to 



Fig. 145. — Coprinus lagopus. Semi-diagrammatic transverse section through three 

 gills and two interlamellar spaces of an unexpanded fruit-body (cf. Fig. 143), to 

 show how the gills are attached to one another by their edges close to the stipe : 

 ch, cheilocystidia of adjacent gills attached to one another ; c c, cystidia (pleuro- 

 cystidia) crossing the interlamellar spaces, i i, and attached to opposing gills by 

 their ends ; s, short basidia ; I, long basidia ; p, paraphyses. Magnification, 

 225. 



elongate, the pileus expands rapidly (Fig. 133, p. 305) and becomes 

 more or less flattened. During the opening of the pileus, adjacent 

 gills become widely separated and one end of each cystidium 

 becomes loosened from the gill to which it was formerly so firmly 

 attached, with the result that in an expanded pileus (Fig. 147, B) 

 the cystidia no longer bridge the interlamellar spaces, but merely 



