164 C. D. Sherbakoff 



5-septate, 55 per cent, 54 x 4.4 (40-61 x 3.5-5.5)/x 



6-septate 1 f 61 x 4.9 (60-70 x 4.7-5.2) M (only four 



measured) 

 7-septate \ 1 per cent \ 67 x 5 (60-79 x 4.7-5.2) m (only four 



measured) 

 8-septate 76 x 4.8 (70-79 x 4.7-4.8) y, (only three 



measured) 



On potato tuber plug, culture twenty-four days old; conidia from a 

 sporodochium, many spores degenerated, only normal ones measured: 



Conidia: 0-septate, none 



1-septate, 4 per cent 



2-septate, none 



3-septate, 50 per cent, 32 x 3.1 (20-40 x 2.7-3.5)/* 



4-septate, 22 per cent 



5-septate, 24 per cent, 42 x 3.5 (35-51 x 3-3.6) m 



On potato stem plug, culture one hundred and thirteen days old; conidia 



from a sporodochium: 



Conidia: 3-septate, 25 per cent, about 38 x 3.3/x 

 4-septate, 25 per cent, about 40 x 3.4/i 

 5-septate, 50 per cent, 42 x 3.5 (36-46 x 3-4.1)/* 



On whole steamed potato tuber, culture forty-five days old: 



(1) Conidia from aerial mycelium 

 Conidia: A — Arthrosporial type 



1-septate, 10 per cent, about 10 x 3.9/z 

 2-septate, 3 per cent, 16 x 4/i 

 3-septate, 71 per cent, 28 x 4.3 (19-37 x 4-5)/t 

 4-septate, 6 per cent 



5-septate, 10 per cent, 41 x 4.2 (37-46 x 4.1-4.5)/i 

 B — Sickle-shaped type 



0-septate, 6 per cent, about 10 x 2.6/t 

 1-septate, 22 per cent, 16 x 2.8 (13-19 x 2.4-3) /z 

 2-septate, 4 per cent, about 21 x 2.9/z 

 3-septate, 40 per cent, 30 x 3.1 (20-34 x 2.9-3.5) /x 

 4-septate, 12 per cent, about 39 x 3.2/* 

 5-septate, 16 per cent, 45 x 3.3 (38-53 x 3-3.6) /i 



