There are not many biological disciplines, which have experienced such fast development as have human and veterinary mycology in recent years. In the initial stages organisms, whoEe influence on man has not b en determined, have been investigated on a purely academic basis and with particular reference to their taxonomic position. As recently as the thirties, the pathogenic agents of dermatophytoses were known collectively under such names as "Micro sporum" and "Trichophyton." Such designation occurred in most medical and veterinary literature irrespective of the fact that fungi are organisms...