win 
1916] 
Emic—Yrast FUNGI 267 
and Sartory (’09) discovered Oospora buccalis associated 
with Endomyces albicans. In other diseases caused by Oos- 
pora, the fungus may occur as a saprophyte or as a para- 
site. These fungi are very closely related to each other 
and cannot always be differentiated sharply. 
Oospora of Trichophyton. 
Gruby (743) was the first to give a clear description of the 
Oospora parasite that causes epidemic and endemic diseases 
of the skin. The morphology of these fungi has been studied 
in the lesions which they produce and in cultures on artificial 
media. This fungus develops into filaments composed of 
short segments. The dimensions of the cells in the same 
filament are approximately equal. Their diameter remains 
invariably the same for the same species, but the length 
of the cells may vary 1 to 2и. The cells may be spherical or 
oval, the mycelial filament being moniliform and easily disso- 
ciated into its different elements. When the mycelial cells 
are cubical, the filaments are more or less extended and not 
easily dissociated. 
The classification of the varieties affecting man, according 
to the infection, falls into two groups. The endothrix group 
contains the varieties of human origin which develop in the 
hair between the cuticle cells and grow exclusively within 
the hair structure. The ectoendothrix group of parasites, 
probably of animal origin, develops in the hair and prolifer- 
ates in the follicle outside. 
More often the scheme of Sabouraud is used, in which are 
considered the mode of infection and principally the cultural 
characters of the isolated fungus when grown on ‘‘proof 
agar.” There are over thirty varieties of Oospora of Trich- 
ophyton, and their differences are chiefly cultural. 
Matruchot and Dassonville (’99), reasoning from analogies, 
place the parasites of Trichophyton in the Ascomycetes, in 
the family Gymnoascaceae. The asexual type of development 
in the Gymnoascaceae, according to these investigators, can 
serve to characterize these fungi with the same degree of 
precision as the complete forms. The demonstrated affinity 
