185 



Isolated from dead corn-stalk in Tennessee by C. E. Kurtzweil. 

 Data on conidial length of H. No. 36 are as follows: 



Frequency, 1 2 3 3 6 11 12 10 12 17 21 9 



Microns, 34 37.1 40.8 44.2 47.6 51 54.4 57.8 61.2 64.6 68 71.4 



Frequency, 10 15 12 11 7 6 3 3 2 1 



Microns, 74.6 78.2 81.8 85 88.4 91.8 95.2 98.6 102 105.4 108.8 



Conidial breadth ranged uniformly from 10.2 to 13.6 microns. 

 Data on septa tion are as follows: 



Frequency, 3 3 6 13 17 8 6 1 1 



Septa, 4 5 6 7 8 9 10 11 12 



Description of H. No. 39. Conidia short, quite uniform in size, 

 cylindrical or very slightly tapering from point of maximum thickness 

 (PJ. XXI, b). Hilum usually evident. Setpa thick, usually three; no 

 constriction. Apical spot barely perceptible. Episporium brittle. Endo- 

 sporium gelatinous. Conidiophores uniform; sterile portion 190-250 n long, 

 smooth, 3.5 ju. thick, not constricted, cells about 17-24 ju long; fertile por- 

 tion much darker and nearly twice as thick as the sterile part, genicula 

 very congested, numerous, usually 35-70 n long. Conidia remaining at- 

 tached in very large clusters. 



Data on conidial length are as follows: 



Frequency, 11 1 2 13 19 19 9 3 2 1 

 Microns, 6.8 10.2 13.6 17 20.4 23.8 27.2 30.6 34 37.4 40.8 44.2 



Conidial breadth was quite uniformly 10.2 ju. 

 Data on septation are as follows: 



Frequency 3 1 31 



Septa 123 



This organism produced on wheat many infection points with the 

 appressoria and "callus," but differed from H. No. 1 in the minute characters 

 of the infection spot. 



H. No. 46 is very closely like H. No. 39. Data on the conidial length 

 of H. No. 46 are as follows: 



Frequency 1 3 4 8 15 4 1 



Microns 8 20.4 23.8 27.2 30.6 34 37.4 



Conidial breadth was uniformly as follows: 



Frequency 2 11 1 



Microns 6.8 10.2 13.6 



The data on septation are: 



Frequency 1 15 



Microns. . 3 



