TRICHOPIIYTONEAE 479 



Center hemispheric, lung white velvet in which icd ])iiri)lc color begins nt surface 

 of medium and gradually extends to the surface of the colony, growth slow 

 (7 cm. in 40 days), pleomorphism not observed, pigment not diffusing; re- 

 verse concolorous; usual type of tinea cruris; inoculable into guinea pig. 



E. purpureum. 



Colony shape not given, creamy white with a port wine tint, short velvet, growth 

 rapid, pleomorphism early, pigment port wine diffusing in glucose not in 

 maltose agar; closterospores rare, nodular organs present, chlamydospores 

 abundant; usual type of tinea cruris, partly pustular; not inoculable into 

 experimental animals. E. rubidum. 



Center small, convex, rose lilac to wine color, growth slow, pleomorphism early, pig- 

 ment not diffusing; colony polygonal to star-shaped on Sabouraud conserva- 

 tion agar; pleomorphic colonies plurizonate, of elevated and depressed 

 zones; lesions of glabrous skin and of palmar and plantar surfaces; inocula- 

 tion of guinea pig difficult. E. persicolor. 



Central knob on both glucose and maltose agar, whitish or dirty yellowish, becoming 

 pale rose; growth and pleomorphism slow, on Sabouraud glucose, rose 

 tinged with violet; reverse yellowish brown with dirty yellowish margin; 

 closterospores absent, chlamydospores abundant; aleurospores, spiral hyphae 

 and nodular organs present; tinea cruris. Ateleothylax Vmnnai (p. 431). 



Central knob on glucose, crateriform on maltose, delicate white velvet, growth slow, 

 pleomorphism present, pigment diffusing, closterospores and chlamydospores 

 abundant, aleurospores not mentioned, tinea cruris. 

 Deep red, grovrth slow. E. rubrwn. 



Delicate pink, growth rapid. E. Perneti. 



Epidermophyton cerebriforme Dodge, n. sp. 



Epidermophyton sp. [C. Die cerebriforme, glatte, grau-weisse Kiiltiir] 

 Cremer, Arch. Derm. Syphilis 169: 256, 257, 1933. 



Isolated from epidermophytosis of hands and feet. In guinea pigs pro- 

 ducing crusts which heal spontaneously in a week, without infecting the hair. 



Aleurospores and chlamydospores abundant, spirals and closterospores 

 seen onlj- in one case. 



Colony cottony at first becoming smooth, center elevated, cerebriform 

 with a flat margin, white finally becoming grayish. On conservation agar, 

 colony remains white, center not elevated, very much folded, margins elevated, 

 only slightly or not at all cottony. No trace of pleomorphism. 



It is probable that the gray Avhite cerebriform strains which various Ger- 

 man workers have referred to E. floccosum or its synonyms belong here. 



Epidermophyton niveum MacCarthy, Ann. Derm. Syphiligr. VI, 6: 41-44, 

 PI. 4, 1925. 



Trichophyton pedis Ota (1931) pro parte. 



Isolated from pseudodysidrosis of plantar surfaces and interdigital spaces, 

 also one case Avitli infected toenails only. France. 



Aleurospores small, 3-4/a, intercalary chlamj'-dospores present. 



On Sabouraud agars, central disc surrounded by concentric rings of de- 

 pressions and elevations, snoAv white with long fine velvet ; reverse brownish. 

 No trace of pleomorphism was observed in 5 months. 



