678 



ANATOMY OF VERTEBRATES. 

 535 



a, Cloacal outlet. 

 Common vestibule. 



c, Urogenital canal, 

 c', Its sphiucter. 



d, Uterus. 

 d', Oviduct. 



e, Ovarian aperture. 



/, Left ovary. 

 /', Right ovary. 

 i, Ovarian ligament. 

 k, Urinary bladder. 

 I, Ureter. 

 m, Os uteri. 



Female organs of generation, natural size, Ornithorhynohus. lxxvi 



