212 C. D. Sherbakoff 



On potato tuber plug, culture ninety-nine days old: 



(1) Conidia from a sporodochium 



Conidia: 0-septate, 5 per cent, 6.2 x 2.4 (4.5-8 x 2-2 9)/* 



1-septate, 1 per cent, 13 x 2.7/* (only a few measured) 

 2-septate, rare, 20 x 3.3/z (only a few measured) 

 3-septate, 92 per cent, 32 x 3.8 (20-38 x 3-4.2) /* 

 4-septate, rare, 37 x 4.1/* (only one measured) 

 5-septate, very rare, about the size of 4-septate 



(2) Chlamydospores, numerous, mostly in conidia 



0-septate, 6.8x5.1 (5.2-7.2 x 4.6-5.3)/* 



1-septate, 9.6 x 5.1 (7.8-12.3 x 4.1-6)/*, the largest 8.8 x 6.1/* 



On potato stem plug, culture one hundred and twelve days old: 



(1) Conidia from a sporodochium 

 Conidia: 0-septate, 1 per cent 



1-septate, rare 



3-septate, 79 per cent, 36.4 x 4.1 (33-39 x 3.9-4.7)/* 

 4-septate, 13 per cent, 40 x 4.2 (36^2 x 3.9-4.4)/* 

 5-septate, 7 per cent, 40 x 4.3 (35^5 x 4-4.7)/* 

 6-septate, very rare, same size as 5-septate 



(2) Chlamydospores, in conidia common, mostly 0-septate, 6.3 x 5.2 



(5.1-8 x 4.3-6)/* 



On whole steamed potato tuber, culture forty-nine days old; conidia 



from a sporodochium : 



Conidia: 0-septate, 4 per cent 



3-septate, 86 per cent, 36 x 3.7 (22-44 x 2.9-4.1)/* 

 4-septate, 8 per cent, 38 x 4.1 (35^3 x 3.9-4.2)/* 

 5-septate, 2 per cent, 40 x 4.1 (37-44 x 4.1)/* 



On rye grain, culture sixty-three days old; conidia from a small sporo- 

 dochium : 



Conidia: 0-septate, 35 per cent 

 1-septate, 12 per cent 

 2-septate, 1 per cent 



3-septate, 45 per cent, 34 x 4 (24-44 x 3.5-4.4)/* 

 4-septate, 5 per cent, 41 x 4.2 (36-47 x 4-4.7)/* 

 5-septate, 2 per cent, 45 x 4.3 (44-51 x 4-4.7)/* 



