Plate VI 



TOP: Penicillium citrinum Thorn, NRRL 806, on Czapek's solution agar, 12 days. CENTER: Penicil- 

 lium Toqueforti Thorn, NRRL 849, on Czapek's solution agar, 10 days. BOTTOM: Penicillium stoloniferum 

 Thorn, NRRL 859, on Czapek's solution agar, 12 days. (Color photographs by Haines, Northern Regional 

 Research Laboratory. Reproduced through co-operation of Chas. Pfizer & Co., Inc.) 



