POPULAR SCIENCE REVIEW. 
atramentarius (Fr.) the cystidia are indeed so large that each 
individual cystidium would hold within itself more than 300 of 
the ordinary cells which go to build up the pileus. These facts 
Pig. l. 
WJE.S. AD. MfiT. SC4 
COPRINTJS COMATUS. Pr. 
Vertical section and surface (P) of Gill enlarged 150 dia. 
regarding the cap and the hymenial surface (to say nothing of 
the gills often completely separating from the horny hymeno- 
phorum, as in Paxillus), and many other known facts in regard 
to the nature of the stem and its outer surface, go far to dis- 
