COPRINUS ATRAMENTARIUS 



265 



and 121, pp. 278 and 284) ; and, finally, when the destruction of the 

 gills has become far advanced, they are often quite plane and even 

 revolute (Fig. 119, p. 280). Their upper surfaces are silvery grey, 



I 



o 



\.> 



Fig. 110. — Coprinus atramentarius. A 

 fruit-body removed from soil near 

 the stump of a dead tree. Just be- 

 fore the beginning of spore-discharge. 

 Photographed at Winnipeg. Natural 

 size. 



FiG: 111. — Coprinus atramentarius. A 

 section of the fruit-body shown in 

 Fig. 110. The spores are ripening 

 from below upwards on the gills. 

 The gills, which are tightly held 

 together by the cystidia, have spHt 

 down their median planes where 

 the fruit-body was cut in two. The 

 hymenial surfaces are deep black 

 and the tramal surfaces grey. Photo- 

 graphed at Winnipeg. Natural size. 



ashen grey, or sometimes brownish 

 in colour ; and they are also 

 innato-fibrillose and more or less 

 scaly, especially at the apex (Fig. 109). The flesh is very thin 

 but entire (Figs. Ill and 121, pp. 265 and 284), so that the outer 

 surface of the pileus does not develop the deep sulcations which 

 come into existence in Coprinus comatus and C. sterquilinus along 

 the backs of the gills (c/. Figs. 121 and 77, pp. 284 and 188). The 

 gills, which will soon be described in much greater detail, are broad, 

 thin, ventricose, and closely crowded together. The interlamellar 



