In the male Platana note : — 



(a) The testes, a pair of ovoid pale-yellow bodies attached to the dorsal 



wall of the body cavity by a fold of the peritoneum. They lie 

 on the ventral sides of the kidneys and are connected to them by 

 efferent vessels which pass into the kidneys. 



(b) The corpora adiposa or fatty bodies lying in front of the kidneys. 



(c) The ureters which run along the outside of the kidneys and unite 



posteriorly to form a single duct opening into the cloaca. 



[In the Frog the ureters do not join together but open separately into the 

 cloaca. Each ureter has a slight swelling, the vesicula seminalis, on its outer side.] 



—Testis 



Kidney 



Corpora 

 " adiposa 



Ureter 



"Vesicula seminalis 



Bladder 



Fig. 9— Male Urinogenital System of Xenopus and Rana. 



26 



