266 C. D. Sherbakoff 



to brick red, plectenchjTiiic bodies, from 2 to 3 millimeters in diameter and 

 from 1 to 4 millimeters high, often bearing characteristic, almost cylin- 

 drical,' usually 1-septate, conidia. 



The strains isolated by the writer differ from those described by Wol- 

 lenweber, b}" more reddish color of plectenchyma, bj^ somewhat narrower 

 conidia and larger (?)^° chlamj'dospores, and by the absence of persistent 

 conidial chains. 



Measurements of conidia of strain 63 on a few different media are as 

 follows : 



On slightly acidified hard potato agar, culture twentj'-two days old; 

 conidia from aerial mycelium: 

 Conidia: 0-septate, rare 



1-septate, 95 per cent, 26.5 x 4.1 (18-30 x 3.5-4.7)^ 

 2-septate, 5 per cent, about the same size as 1-septate 



On red raspberr^^ cane plug, culture fifty-one days old; conidia from 

 a sporodochium: 

 Conidia: 0-septate, 50 per cent, 13x3 (8-28 x 2.6-4) /i 



1-septate, 50 per cent, 27 x 3.9 (24-31 x 3-4.3)// 



On hard lima-bean agar, culture one hundred and fifty-three days old; 

 conidia from a sporodochium: 



Conidia: 0-septate, 1 per cent, 10x3.4 (7.9-12.3x3-3.5)// 

 1-septate, 99 per cent, 26 x 3.8 (20-32 x 3.5-4)/i 



Average of the above measurements: 

 Conidia: 0-septate, 17 per cent, 11.5x3.9// 

 1-septate, 81 per cent, 26.5 x 3.9// 

 2-septate, to 5 per cent, same as 1-septate 



The average size of conidia according to Wollenweber's measurements is: 

 Conidia: 0-septate, rare, 14 x 3.8/i 



1-septate, 100 per cent, 23.6 x 4.3// 

 3-septate, rare, 30 x 5// 



It is possible that strain 63, on a thorough comparative study of it 

 with R. Magnusiana, may prove to be a distinct variety; but it is evident 

 that the resemblance between the two in all important characters is close 

 enough to warrant its being placed in the species R. Magnusiana. 



60 WoUenweber does not give the size of chlamydospores, but it can bs interpreted that it is the same 

 as for R. Candida (Ehr.) Wr., namely, 5-8;! in diameter. Chlamydospores of the strains described here on 

 corn meal agar in cultures one hundred and seventy-three days old measured 10 x 11 (7-11 x 9-16) /i. 



