678 



ANATOMY OF VERTEBRATES. 



535 



a, Cloacal outlet. 



6, Common vestibule. 



c, Urogenital canal. 

 c', Its sphincter. 



d, Uterus. 

 d', Oviduct, 



e, Ovarian aperture. 



/, Left ovary. 

 /', Right ovary. 

 i, Ovarian ligament. 

 k, Urinary bladder. 

 I, Ureter. 

 ?. Os uteri. 



Female organs of generation, natural size, Oruithorhynclms. LXXVI. 



