654 



the genus coniothecium. 

 General Considerations. 



On culture media the niycelium, at first colourless, later 

 becomes dark brown and torulate. This torulate condition is 

 also evident in the mycelium on the host. 



Fig. 1. 



Tn the media this condition results ultimately in the forma- 

 tion of intercalary chlamydospores, and the packets of Conio- 

 thec'ium spores evidently arise by these torulate cells remaining 

 united, dividing, and the individual cells expanding. This is 

 borne out by certain stages in the formation of these cells as 

 observed in cultures. 



The mycelium on all the media is distinctly septate and 

 branched. The individual cells are usually 13.2 to 26.4 ix long,, 

 though longer cells are ])resent. The hyphae vary greatly in 

 breadth, the coloured being invariably broader and firmer than^ 

 the colourless, and usually measure 4.95 to 6.6 //. across. 



