THE ASPERGILLUS NIDULANS GROUP 



157 





Fig. 39. Conidial structure in the Aspergillus nidulans group, X 900: A u Typical 

 conidiai head of A. nidulans, XRRL Xo. 187; Ao, Diminutive head of the same strain; 

 B, Typical head of .4. caespitosus, XRRL Xo. 1929. 



Fig. 40. Aspergillus nidulans. A, Conidial heads, X 370. Conidiophores arise 

 either from the substratum or from aerial hyphae. B, Hiille cells, X 740. 



