Fig. 16. — Coprinus curtiis. To show splitting of a gill and the position and growth 

 of giant tramal cells. A, transverse section of part of the pileus-flesh and 

 upper part of a long gill at 7 p.m. on the day before pilear expansion : a, a 

 groove in the flesh ; b, palisade cells ; c, a young hair not yet capitate ; d d, 

 giant tramal cells in the centre of the trama, at present relatively small ; 

 e, long basidia ; /, a short basidium ; g, paraphyses. B, transverse section of 

 the middle part of a long gill in the morning of the day of spore-discharge when 

 the pileus was expanding and the gill had become cleft down its middle plane : 

 «, two giant tramal cells (drawn with the camera-lucida) now greatly swollen, 

 in the cleft of the gill ; h, ordinary tramal cells ; c, a long basidium ; d, a short 

 basidium ; e, two paraphyses. C : a and 6, the bases of parts of two cleft 

 gills seen from the top of the pileus (c/. Fig. 18) and outlined diagrammatically, 

 containing greatly swollen giant tramal cells (drawn with the camera-lucida) ; 

 c, two elongated giant tramal cells ; d, the largest giant tramal cell observed. 

 Winnipeg material. Magnification, 293. 



