44 



VARIATIONS IN THE LOWER, FUNGI 



Fig 26. Spontaneous variation in a dermatophyte, Trichophyton mentagro- 



phytes: 1, an original strain; 2, 3, and 4, variants derived from it; 5, another 



strain; 6, variant derived from it. From C. W. Emmons, Arch. Dermatol. 



Syphilol. {Chicago), 25, 987 (1932). 



