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Three Different Types of Tumors in Salientia

( Group IX Laboratories, Shrodells Hospital, Watford, Herts, England)

Three tumors of widely differing structure occurring in Salientia (Amphibia) are described. They are: (a) a nephroblastoma, (b) an atypical facial papilloma or melanocarcinoma, and (c) an epithelioma resembling ulcus rodens. The first two tumors occurred in specimens of the South African claw-footed toad (Xenopus laevis D.), the third in a specimen of the common grass frog (Rana temporaria L.).

Received 3/27/63.