B 



FIG. 40. Penicillium ^ 



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

 mycelium (my], submerged hyphrc (s. hy], and aerial hypha? (a. hy}. 



n, group 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 srnall group of germinating 

 spores. 



