gonocyst

A membrane around the spermatogonia in the male gonads.

The spermatogonia continue to reside in the gonocyst and form spermatocyte, which begins to increase in size.

An expansion of the zoarium in which multiple embryos develop.

Ovicell in the form of a pyramidal hemispherical sac ( gonocyst ) with a terminal oeciostome, formed on the coalesced distal cells, Axis of the ovicell parallel to the axis of the cells.