PHYLUM CHORDATA 



585 



the narrow anterior parts or Fallopian tubes. In air;Mammals 

 there is, in the vestibule or urinogenital passage through which 



A B 



ffa 



Fig. 1212. — Various forms of uteri in Butheria. A, B, C, D, diagrams illustrating the different 

 degrees of coalescence of the oviducts. A, two distinct uteri. B, bicornuate uterus. C 

 uterus with a median partition. D, complete coalescence. E, female reproductive organ.s 

 of one of the Mustelina with embryo.^ (**) in the uterus. F, female reproductive organs of the 

 Hedgehog. B, urinary bladder ; Ce. cervix uteri (neck of uterus) ; N, Nn, kidneys and 

 adrenal bodies ; Od. Fallopian tube ; Ot. ostium tub£e (abdominal opening of oviduct) ; Su/j. 

 urinogenital sinus ; r. rectum ; l/r. ureters ; Ut, uterus ; Vf/. vagina ; ft, accessory glands. 

 (From Wiedersheim's Comparative Anatomy.) 



the vagina communicates with the exterior by the aperture of the 

 milva,si small body — the clitoris — the homologue of the penis and 

 sometimes perforated by the urethral canal. ■ 



