ABSTRACT
In 1926 de Beaumont showed that some of the secondary sexual characters of the male newt, Triturus cristatus, could be produced in the spayed female by testicular transplants. About the same time one of us (Noble, 1926) noted that cloacal glands could be made to arise de novo in the glandless cloaca of the female Desmognathus fuscus fuscus by the same method. Ponse (1923) with young females, and Welti (1925) with adult females, had previously demonstrated that toads which had been experimentally masculinised would develop nuptial pads. The above investigations were of interest in that they demonstrated, in both Caudata and Salientia, that structures not visible even as rudiments in the female could be made to appear and develop under the influence of the male sex gland.
