The subject will be arranged under the following headings.
Nomenclature and Classification: Bringing out the attitude of the taxonomist and the bearing it has on the selection of an appropriate name for these intertriginous (primarily and essentially) ringworms.
Etiology: The flora of normal skins. The rôle of bacteria, blastomycetes and hyphomycetes—are the last mentioned solely responsible for everything charged against them in epidermophytosis? A catalog and distribution (anatomic and geographic) of the various species reported. The status of the dermatophytids.
Laboratory Diagnosis.
Hygiene: The viability of ringworm material "extra corpore."
Histopathology.
Rational Therapeutics: What can the laboratory offer in this direction?
Before proceeding to the body of this paper, I wish to say that I have attempted to present the case in such a way that the reader will maintain a point of view in which he can judge the situation for himself; I