Tannage quinonique de la capsule ovigère de la Roussette Scyliorhinus canicula (Linné)

Abstract

Histochemical and histoenzymological investigations performed on sections of the capsule wall have led to the localisation of the substances involved in the process of quinone tanning. Ultrastructural autoradiography and cytochemical and cytoenzymological techniques applied to the nidamental gland have helped to clarify previous histochemical results and to establish a link between gland secretions and the different capsule layers; a hypothesis concerning the capsule secretion process and its hardening is presented.