THE CURTUS SUB-TYPE 3 



downwards, so that in cross-section they resemble the letter Y. 

 The gills are so shallow that the leg of the Y is very short. 



(8) Autodigestion takes place from below upwards on each gill 

 but only affects the lower unspUt part, so that the upper divided 



Fig. 1. — Coprinus curtus (= C. plicatiloides of Vol. I). Fruit-bodies coming 

 up spontaneously on unsterilised horse dung in a large glass chamber 

 in the laboratory at Winnipeg at about 11 a.m. As each pileus flattens 

 out, its disc becomes depressed like that of C. plicatilis. Natural size. 



part of each gill and the extremely thin flesh remain intact. Rela- 

 tively to the sizes of the fruit-bodies, therefore, there is much less 

 autodigestion in the Curtus Sub-type than in the other Sub-types 

 with the exception of the Plicatilis Sub-type where autodigestion 

 does not take place at all. 



In certain respects, namely, in possessing flanges, in the absence 

 of cystidia, in the manner in which the interlamellar spaces are 

 secured in the young fruit-body, and in the dimorphism of the 



