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Spontaneous Epidermal Tumor in an Adult Newt, Cynops pyrrhogaster¹

Department of Developmental and Cell Biology, University of California, Irvine, California 92664

The occurrence of spontaneous papillomas in the skin of a newt, Cynops pyrrhogaster,² is reported for the first time, and a histological description of the tumor is given. The tumor was composed of both epidermal and dermal elements, but only the epidermal elements showed abnormalities.

¹ Supported by Special Grant 535(C-1) from the California Division of the American Cancer Society.

² Previously known as Triturus pyrrhogaster (15).

Received 7/ 5/72. Accepted 11/22/72.