252 Zoological Society. 



the oviduct describes its convolutions in its course towards the uterus. 

 The stroma ovarii contained at its periphery a few advancing ovisacs 

 about a hne in diameter. 



Each cornu uteri is about 1 foot 4 inches in length, and of a nearly 

 uniform circumference of 2 inches. It is beset with narrow, wrinkled, 

 obhque, irregular rugae, forming longitudinal elevations as they ap- 

 proach the body of the uterus, and again becoming obhque — patches 

 of the rugous surfaces alternating vnth smooth patches. 



The common uterus presents large, longitudinal, wrinkled rugae 

 for the first inch of its extent, and then a spiral valve begins to be 

 formed, about 2 hues in thickness, which describes thirteen close 

 coils before subsiding in the common vagina ; the length of the spiral 

 portion, which may be compared to the ' cervix uteri,' is 3^ inches ; 

 the length of the vagina is 4 inches. The rugae of the vagina are 

 longitudinal, and longer at its beginning and end, where they termi- 

 nate on a well-defined circular fold, dividing the vagina from the uro- 

 genital canal, and constricting the orifice ; the free borders of the 

 spiral valve are beset by free, fine, longitudinal folds of the lining 

 membrane of the uterus. 



The urethra is about 3 inches in length, and becomes closely con- 

 nected with the vagina 2 inches before it terminates. Its orifice is 

 defended by two longitudinal folds. 



In comparison with the Common Hog, the Wart-Hog, as regards 

 its internal anatomy, differs in the more simple form of the stomach, 

 the relatively shorter small intestines, and the relatively longer large 

 ones ; but, like the Common Hog, the caecum is small, and the colon 

 disposed in spiral coils, in both which characters they resemble the 

 Ruminants ; the caecum is broader in proportion to its length than 

 in the Common Hog. In both the Common Hog and Wart-Hog 

 the intestinal canal is more tied down by the fat-laden processes of 

 peritoneum, and appears to have less motion allowed it, than in other 

 quadrupeds. The liver and gall-bladder, the kidneys and the tho- 

 racic viscera, much resemble those of the Common Hog. The inner 

 surface of the jejunum shows a reticulate disposition of rugae in the 

 Common Hog, but not the regular longitudinal folds in the duede- 

 num and beginning of the jejunum, as in the Wart-Hog. 



The epiglottis passes into the posterior uares in both the Wart-Hog 

 and Common Hog, and has the hyo-epiglottidei muscles ; but the pha- 

 rynx in the Common Hog does not present the superadded sacculi, 

 nor the larynx those peculiarities which distinguish the Wart-Hogs. 

 These resemble the I3abyrussa in the sacculated structure of the 

 pharynx, but differ in the more simple stomach. The Wart-Hog 

 differs from the Common Hog in the smaller size and more simple 

 form of .the ovaria, and the fewer mammae. The most marked dif- 

 ference from all other Suidce, and that which best justifies the generic 

 separation, is presented by the dentition of the Phacochcerus ; the 

 modifications of the alimentary canal are not of the same degree. 



