438 



TEXTBOOK OF ZOOLOGY 



the anus. During copulation they are transferred to the cloaca of 

 the female by use of the claspers. They swim by their own motility 

 into the uteri and oviducts. 



Fig. 237. — Urogenital systems of Sgualus acanthias; A, female; B, male. 



The ova of the female are produced in the ovaries which are located 

 one on each side of the median dorsal line in the anterior portion of 

 the coelom; Each gonad is suspended in a mesentery, the mesovarium. 

 Mature ova rupture from the ovary into the body cavity and enter 



