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. Hodges 1 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 Bang 2 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