48 BRinSII FUNGI 



destroy, or at all events prevent the development of another kind 

 of fungus, and further that the mycelium of a white-spored fungus 

 is more potent in this respect than the mycelium belongmg to a 

 fungus belonging to an\' other group. Next in power come the 

 pink-spored section, followed by the brown-spored, and finally 

 the black-spored group, which, if this idea is correct, are limited 

 in their choice of ground to those places not previously occupied 

 by any of the other groups. Carefully conducted experiments 

 alone can decide this point. 



