SPORE-DEPOSITS 81 



lation of the spores took place under a large tumbler during a 

 night. In Fig. 34, B, one sees that the gills are not perfectly 

 outlined. In this case the rim of the pileus did not quite 

 touch the paper all round. The pileus was exposed on a table, 



Fig. 33. — Spore-deposits from a pileus of Anellaria separata. A pro- 

 duced in fifteen minutes, B in one hour, and C in six hours. 

 Photographed natural size. 



and therefore affected by convection currents slowly sweeping 

 beneath it. The result of this was a slight displacement of the 

 falling spores. In Fig. 34, C, there is shown a deposit made under 

 a tumbler in the course of four hours from a perfect pileus, the 



A 



Fig. 34. — Spore-deposits from three pilei of Andlaria separata showing the 

 effect of convection currents. Explanation in the text. Photographed 

 natural size. 



rim of which was in contact with the paper throughout. Here 

 the spores fell vertically downwards, and have therefore given an 

 excellent print of the gills. If one allows spores to fall from 

 small pieces of pilei placed in specially constructed chambers, 



