TRICHOPHYTONEAE 507 



Growth rapid, 5 cm. in 3 weeks, white downy, smooth, and hemispheric 

 at first, center becoming umbilicate, elevated, 1.5 cm., Avith a thin reddish 

 velvet; margin white and downy; reverse deep dark brown. Pleomorphism 

 in 40 days, medium dark red. On peptone agar (24 days), colony 1.5-2.0 cm., 

 snow white down and thin yellowish center ; reverse not colored. 



Species of Doubtful Position 



Trichophyton rodens Paul, Med. Jour. Australia 4: 2: 496, 497, 3 figs., 

 1917. 



Lesions in men who had been handling wheat infested with mice, which 

 were partially denuded of hair. Eruptions on exposed parts and numerous 

 and extensive areas of pustulation (multiple kerion) on the hairy portions 

 of the face. At first it resembles goose-skin without redness, later with 

 erythema and pruritus, especially at night. The early lesions have rounded 

 and sharply circumscribed borders in which are scattered discrete vesicles, 

 vesicopustules, and pustules on an erythematous base ; desquamation absent. 

 Later the vesicles and pustules disappear and papules or papulovesicles ap- 

 pear with a surface of dry scaly roughness as in chronic eczema. 



Colony a slightly raised central knob, purple lake, covered with a creamy 

 white powder on the tenth day; pleomorphism in a few weeks. 



While this species is too briefly described to place definitely, its lesions 

 and general habit and probable animal origin seem to place it in Ectotrichophy- 

 ton. Its colony characters should make it recognizable if encountered again. 



Trichophyton depressum ]\IacCarthy, Ann. Derm. Syphiligr. VI, 6: 184- 

 190, PI. 1, 3 figs., 1925. 



Intense pruritus between the shoulder blades of an Italian cook in France. 

 Lesions showed an elevated border with a few vesicles, covered with fine 

 brownish scales. 



Only aleurospores, 3-4/t or smaller, borne on either simple or compound 

 thyrses reported. Cultivated only on Sabouraud agars. 



Center depressed with irregular, ill-defined borders, bottom of the crater 

 furrowed, cream color; margin snow white, powdery and velvety; no trace 

 of pleomorphism. On Sabouraud conservation agar, growth slower but more 

 characteristic. On fortieth day, colony 2.5 cm. in diameter, center yellowish 

 gray with spots of short white velvet, depressed in the center with irregular 

 furrows, subcerebrif orm ; suiTOunded by whiter zone with about 16 radial 

 furrows ; margin narrow, ashy. 



Achorion Arloini Busquet, These, Lyon 1890; Ann. Micrographie 3: 9-21, 

 62-76, 136-149, Pis. 2-4, 1891. 



Aleurisma Arloingi Vuillemin apud Massia & Grigorakis, C. R. Soc. Biol. 

 91: 1381, 1382, 1924. 



Case history by Desir de Fortunet, Lyon Med. 62: 253-256, 1889; Desir 

 de Fortunet & Courmont. Ann. Derm. Syphiligr. TIT 1: 239-242, 1890. Cir- 



