PIGS 271 



Key to the Genera of Suidce 



No warts on cheek below the eye; upper tusks short, bent downward, 

 their points cut obliquely off by wear on the short 

 lower tusks; body well haired, colors reddish or black, 

 with a white dorsal mane; skull of boar with a bony 

 process above upper canine; first lower premolar 

 tooth wanting Potamochcerus 



A prominent wart below the eye; upper tusks long, curved upward and 

 inward, only their lower edge coming in contact with 

 the cutting edge of the lower incisor tusks 

 Wart below eye shelf-like and horizontal, not conical, in shape; 

 body well haired, but dorsal hair not forming a longer 

 mane; upper canines smaller and less curved inward; 

 skull with a high lambdoidal crest and a deep hol- 

 low on crown or parietal region; last molar trans- 

 versely ridged, not wearing down to a flat surface, 

 short; head not enlarged Hylochcerus 



Wart below eye conical, and another on sides of head near mouth; a 

 prominent ridge, covered by white whiskers, on lower 

 part of cheek; upper tusks enormously developed and 

 curved inward and upward in a semicircle; skull 

 without hollow in parietal region; last molar long, 

 occupying more than one-half the tooth row, crown 

 with flat surface; head much enlarged; hair covering 

 scanty on sides and under-parts Phacochcerus 



Bush Pig 



Potamochcerus 



Potamochcerus Gray, 1852, Proc. Zool. Soc, p. 131; type P. koiropotamus 

 of South Africa. 



The bush pigs are closely related to the genus SuSy of 

 which our common domestic pigs are familiar representa- 

 tives. They represent an African branch which has di- 

 verged slightly from the original Sus stock. The boars 

 have developed on the skull above the upper canine teeth a 

 bony growth, or process, which projects upward an inch or 



