GENERATIVE ORGANS OF THE KANGAROO. 



825 



likewise double, and embraced by powerful muscles. In the Kangaroo, 

 moreover, the spongy erectile tissue that encloses the urethra passes 

 with that canal through the centre of the body of the penis, formed by 

 the corpora cavernosa, so that a glans can scarcely be said to exist ; but 

 in other Marsupials, as, for example, in the Opossums (Diddpkys), the 

 extremity of the introinittent organ is bifid, thus forming another ap- 

 proximation to the oviparous type. 



(2438.) In the female Kangaroo, and other Marsupials, there are still 

 two distinct uteri, opening into the vagina by distinct orifices ; and even 

 the vagina itself is double, exhibiting a very peculiar and interesting 

 arrangement, represented in the subjoined figure (fig. 416). The ovaria 



Fig. 416. 



Generative organs of the female Kangaroo. 



(a a) are now reduced to comparatively small dimensions when com- 

 pared with those of the Ovipara a circumstance that depends upon the 



