CONTRIBUTION TO THE STUDY OF TRICHOPHYTON PURPUREUM BANG, TRICHOPHYTON INTERDIGITALE PRIESTLEY AND TRICHOPHYTON "B" HODGES: ALSO ON TRICHOPHYTON "α" AND TRICHOPHYTON "β" OF THE AUTHOR

TRICHCPHYTON PURPUREUM BANG  Although I had frequently observed this species in Japan and Manchuria, I had no definite ideas about it until I paid a visit to Dr. Robert S. Hodges¹ at the University of Alabama, read his recent paper and discussed it with him. Owing to this lack of knowledge, I had previously incorrectly classified this species as Trichophyton acuminatum. Fortunately I had brought to America from Japan cultures of three strains of this species, and, with the kind permission of Dr. Fred D. Weidman, made a full study in the Laboratory of Dermatological Research at the University of Pennsylvania.

Review of the Literature.—  In 1910, Henrick Bang² published an exhaustive description of a new species of trichophyton which he cultivated from glabrous parts of the human body, and named (after himself) "Trichophyton purpureum Bang."The cultures of his strain on Sabouraud's glucose or maltose agar were