Fio. 40. — Penicilliuin glmutim. 



A, Diagrammatic vertical section of a young growth ( x 5), showing 

 mycelium {my), submerged hyphse (j. hy), and aerial hyphag (a. hy). 



B, grt)up of spores : I, before commencement of germination ; 2, after 

 imbibition of fluid : the remaining three have begun to germinate. 



c, very young mycelium formed by a small group of germinating 

 spores. 



