A2 



\i 



a A2 



Kk;. 48. Tlie Feiiiciltium thumii series. .4, P. thomii Maire: Ai, Habit sketches 

 i)i representative penicilli, X 140; Ai, Penicilli of the same species seen under oil 

 immersion, X 1400 — note the delicately echinulate character of conidiophore walls. 

 B, P. sderoliorum v. Beyma: B,, Habit sketch of penicilli, X 140; B^, Detail of single 

 penicillus, X 1400. C, P. lapidosum Raper and Fennell: Ci, Habit sketches, X 140; 

 Ci, The same under oil immersion showing cellular details and variations in structure, 

 X 1400. 



157 



