AMPHIBIA 



287 



-Esophagus 

 -Anterior end of oviduct 

 ^ —Mesentery 



Ureter (Wolffian duct) 



Oviductol opening 

 Ureter opening 



Cloaca 



Urinary bladder 



Fig. 154. Urinogenital system of female frog. (Drawn by W. J. Moore.) 



