SURFACE MYCELIUM 



97 



Fig. 55. — Coprinus sterquilinus. A group of maturing fruit-bodies coming up on 

 sterilised horse dung in a large crystallising dish. A thin and characteristic 

 white layer of mycelium covers each dung-ball. The fruit-bodies originated 

 in dark clefts between the dung-balls at or near the bottom of the dish. The 

 pilei and stipes are still white because they have not yet begrm to develop a 

 brown pigment in the vacuoles of their cells, and each pileus is carrying upwards 

 at its base a ring of tissue which, when the pileus begins to expand, will be 

 dropped on to the stipe as an annulus. Natural size. 



TOL. IV. 



H 



