XIII 



PHYLUM CHORDATA 



585 



the narrow anterior parts or Fallopian tubes. In all Mammals 

 there is, in the vestibule or urino genital passage through which 



v ff 



I) 



FIG. 1212. Various forms of uteri in Eutlieria. A, B, C, D, diagrams illustrating the different 

 degrees of coalescence of the oviducts. A, two distinct uteri. 13, bicornuate uterus. C 

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

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

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

 adrenal bodies ; Od. Fallopian tube ; 01. ostiuni tuba* (abdominal opening of oviduct) ; Sug. 

 urinogenital sinus ; r. rectum ; Ur. ureters ; Ut. uterus ; Vg. vagina ; ft, accessory glands. 

 (From Wiedersheim's Comparative Anatomy.) 



the vagina communicates with the exterior by the aperture of the 

 vulva, a small body the clitoris the homologue of the penis and 

 sometimes perforated by the urethral canal. 



