TRICHOPHYTON TONSURANS 



419 



washing the scales and hairs in an alkaline (potassium hydroxide) 

 solution, which killed the bacteria, but left enough mould intact for 

 subsequent successful inoculations. The trichophyton grows best at 



Fio. 165 



Portion of a hair invaded by the Trichophyton endo-ectothrix. X 550. a, a, chains of 

 spores in focus; &. a chain situated farther within the hair, and hence not in focus. (P'rom a 

 photomicrograph.) 



i FIG. 166 



Trichophyton ectothrix culture, three weeks old, from a case of Tinea sycosis. (Mewborn.) 



