Platk I 



A-D, Aspergillus nidulans (Eidam) Wint., XRRL No. 193: .4 (upper left), portion of colony showing 

 developing peritheeia and abundant conidial heads; B (upper right), conidial heads showing typical color 

 and columnar form, X 60; C (center left), photomicrograph of conidial heads showing brown-walled conidio- 

 phores and green conidia, X 500; D (center right), ascospores, red in color and showing two equatorial ridges 

 when seen in profile, X 1200. E and F, Aspergillus janus Raper and Thorn, NRRL No. 1787: E (lower left), 

 single colony showing crowded short -stalked green heads in central area and long-stalked white heads in 

 localized marginal areas, the yellow-white, floccose areas being composed largely of hiille cells; F (Jower right >, 

 portion of same colony somewhat enlarged, X 8. (Color photographs by Haines, Northern Regional Research 

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



