374 



COMPARATIVE ANATOMY 



Oct Od 



ILw 



B 



I) 



FIG. 298. VARIOUS FORMS OF UTERI. A, B, C, D, diagrams showing the 

 different stages in the fusion of the Miillerian ducts : A, uterus duplex ; B, 

 uterus bicornis ; C, uterus bipartitus ; D, uterus simplex ; E, female urino- 

 genital apparatus of Mmtdiiia, containing embryos (*, *) in the uterus ; F, 

 ditto of Hedgehog (Erinaceus). 



Od, Fallopian tube ; Ut, uterus ; Vg, vagina ; Ce, cervix uteri ; Of, abdominal 

 aperture of Fallopian tube ; t, f, accessory glands ; r, rectum ; Sny, urino- 

 genital canal ; K, kidney ; Nn, adrenal ; Ur, ureter ; B, urinary bladder. 



always pass to the outer sides of the genital passage, the vagina 

 being single. 



The urinogenital canal may, as in Marsupials, be of a consider- 

 able length (e.g. amongst Rodents), and a fold of the mucous 



