Histological changes in Xenopus laevis Daudin adult specimens kept under dry conditions, then moved back to their natural aquatic environment. II. Skin, kidney and interrenal tissue.

Some cytological and histochemical characteristics of skin, the kidney and interrenal tissue were studied in Xenopus laevis adult specimens (1) kept in their natural aquatic environment; (2) gradually exposed to dry conditions under which they were kept one week; and (3) returned from the dry environment to water for 24 hr or a week. In the skin, the most relevant changes are those exhibited by epidermal "flask" cells. These cells are generally rather lean, tall and PAS-positive in "dry" animals and in those 24 hr after replacement in water, whereas in animals placed back in water for a week "flask" cells are often large and faintly stainable.