254 CD. Sherbakoff 



On potato tuber plug, culture sixty-five days old; conidia from a sporo- 

 dochium: 



Conidia: 0-septate, few 



1-septate, 12 per cent, about 22 x 5/t (only one measured) 

 2-septate, 16 per cent, about 27 x 5.3m (only one measured) 

 3-septate, 72 per cent, 29 x 5.6 (24-35 x 4.8-5.9) n 



On corn agar, culture one hundred and seventy-five days old; conidia 

 only few, chlamydospores numerous, terminal and intercalary: 



Chlamydospores : 0-septate, in mycelium, 11.3 x 9.3 (8.5-16 x 7.5-11)^ 

 1-septate, in mycelium, 16.3 x 9.9 (14-20 x 8-14) /z 



On hard lima-bean agar, culture twelve days old; conidia from pseudo- 

 pionnotes: 



Conidia: 0-septate, 4 per cent 1 (percentage may vary considerably 

 1-septate, 15 per cent > from somewhat greater than figures 

 2-septate, 16 per cent J given here to nearly zero) 

 3-septate, 65 per cent, 33 x 5.2 (27-37 x 4.7-5.6) /x 



Average of the above measurements: 



Conidia: 0-septate, 9 per cent, 12 x 3.7/* 



1-septate, 15 per cent, 23 x 4.75/z 

 2-septate, 18 per cent, 27 x 5.3/z 

 3-septate, 57.5 per cent, 30.5 x 5.5/* 

 4-septate, 0.5 per cent, 35 x 5.5/* 



58. Fusarium Solani (Mart. p. par.) Ap. et Wr. var. suffuscum n. 

 var. (Fig. 45, k to t) 



Differs from F. Solani and F. Solani var. cyanum mainly by typically 

 well-developed, uniform, fine, aerial mycelium, with mass of chlamydo- 

 spores at maturity which gives it a pale brownish tint; by sparse conidial 

 production on aerial mycelium; and by the fact that sporodochia are usually 

 few and distant from one another. 



Hab. On rotted tubers of Solanum tuberosum, Wisconsin. 



