Abstract
The dermatophytes of Canada at present number eight well-established species. On the basis of the morphology of the macroconidium (agreed to be the most valuable taxonomic criterion for dermatophytes) it is suggested that Microsporum fulvum be re-established as a species, and that an Alberta strain of Trichophyton, previously described, be given species rank and the name T. Otae. Criteria for species identification other than spore morphology are evaluated. Spores of T. gypseum are readily obtained on fertile hens' eggs, oidia upon the living chorioallantoic membrane, macro- and microconidia upon the same tissue after death. Macroconidia are produced no more abundantly on the egg than on standard media.
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