This sac has been already referred to as a coelomoduct.
Levites, Prophet, Sac Rifice).
In the majority of the Megascolicidae each sac is provided with one or more diverticula, tubular or oval in form, of a slightly different histological character in the lining epithelium, and in them is invariably lodged the sperm.
Sp', Spermathecal sac involving the last.
Thus, in Philaemon pungens (Lambert) it has the form of a large sac, into which open by a single orifice the conjoined oviducts.