504 MEDICAL MYCOLOGY 



The central knob white, downy, projecting 3 mm. in diameter; next a 

 white zone 3-5 mm., a smooth tobacco (Havana) -yellow zone 5 mm., a gray 

 zone with the appearance of chamois leather with 5-6 concentric, very narrow 

 circles and a margin of pure white radiating hyphae ; 7-8 radial furrows. 

 Colony essentially similar on other media. 



Magalhaes considered this species close to Microsporum fulvum, but its 

 morphology suggests Ectotrichophyton. 



Ectotrichophyton mentagrophytes (Robin) Castellani & Chalmers, Man. 

 Trop. Med. ed. 3, 1005, 1919. 



Mentagrophytes Gruby, C. R. Acad. Sci. 15: 512, 513, 1842. 



Microsporon mentagrophytes Robin, Hist. Nat. Veg. Paras, qui croissent 

 sur ITiomme. . . Anim. 430-436, 1853. 



Sporotrichum {Microspoi'um) mentagrophytes Saccardo, Syll. Fung. 4: 

 100, 1886. 



Trichophyton megalosporon pyogene du cheval Sabouraud^ Ann. Inst. 

 Pasteur 7: 497-528, Pis. 6, 7, 1893. 



Trichophyton farinaceum album polysporum Rosenbach, tjber die tiefen 

 eitemden Schimmelerkrankungen der Haut 36, 1894. 



Trichophyton du cheval a cidtures blanches Bodin, Teignes tondantes du 

 cheval 66-83, 1896. 



Trichophyton mentagrophytes Gedoelst, Champ. Paras. Homme 86, 87, 1902. 



Trichophyton gypseum Bodin, Champ. Paras. Homme 115-118, 1902. 



Trichophyton asteroides Sabouraud, Maladies du cuir chevelu 3: 347, 1910. 



Trichophyton mentagrophytes var. asteroides Neveu-Lemaire, Precis Para- 

 sitol. Anim. Domest. 69-71, 1912. 



Trichophyton gypseum var. asteroides Auct. 



Sahouraudites asteroides Ota & Langeron, Ann. Parasitol. Hum. Comp. 1: 

 327, 1923. 



Aleurosporia rosacea Grigorakis, Ann. Sci. Nat. Bot. X, 7: 413, 1925. 



Microsporum (Closterosporia) asteroides Guiart & Grigorakis, Lyon Med. 

 141: 377, 1928. 



Ctenomyces mentagrophytes Langeron & Milochevitch, Ann. Parasitol. 

 Hum. Comp. 8: 484, 1930. 



Spiralia mentagrophytes Grigorakis, C. E. Soc. Biol. 109: 186-188, 1932. 



Isolated from kerions of glabrous skin and beard. Pound on the horse 

 and inoculable into the guinea pig and Silenus rhesus (Ashford, McKinley 

 & Dowling 1930). Common in France, Germany, and Hungary, occasionally 

 found in Sao Paulo in Brazil, Uruguay, Tomsk in Siberia, and Japan, among 

 agricultural laborers. Parish & Craddoek (1931) describe an epidemic among 

 laboratory workers, contracted from mice. 



Closterospores 3-5-celled, cells easily separating before germination ; 

 chlamydospores 4-5/a, not numerous; aleurospores 2-3/* in diameter; borne in 

 large compound thyrses, spirals abundant, of 12 or more turns, characteris- 

 tically formed following hyphal anastomoses. 



