The possibility of utilizing gene pools from wild cottons in the improvement of commercial varieties, with special reference to seed quality, has led to the quanititative analysis of seeds from several species of Gossypiumun. The prinmary purpose of the study was to suipply data for Gossypiumt species that may serve to aid. plant breeders in their selectionls of breeding materials. Seed from the species listed in Table I were grown in Iguala, Mexico, in 195657, and shipped to New Orleans where they were stored under refrigeration until prepared for analysis. Species names used follow the classification of Hutchinson, Silow, and Stephens (3). The seed was decorticated and ground in a Wiley mill3 to -pass through a 20mesh screen. The ground materials were analyzed for imioisture, oil, and nitrogen by appropriate metlhods of the Americani Oil Chemists' Society (1); for lysine by the method of Conkerton and Framptoni (2) after prior removal of the oil by pentane extraction; an(l for total gossypol by the procedure of Pons, Pittman, anid Hoffpauir (4). The identity of gossypol in the extracts of the seed of the several species was established by a spectro-