Studies on the oogonial cycle in Puntius ticto (Ham.) III. Formation of degenerated follicles.

: In Puntius ticto, the atresia has been observed both in mature and empty follicles. In empty follicles, theca becomes highly vascularized and the granulosa layer hypotrophied. The later invades into the lumen of the empty follicle and finally disappears. In yolk laden follicles, both theca and granulosa show hypertrophy in their cells. The granulosa becomes multilayered and finally starts digesting yolk globules after liquefying it.