Dr. J. E. Gray on Potamochoerus penicillatus. 65 



Wild Boar from Continental India, and though they offer considerable 

 variation, I cannot discover any constant easily-described character 

 by which I can distinguish the European and the Indian kinds from 

 each other, and this is the case with many other genera allied to the 

 Pigs. We have in the Zoological Gardens the Wild Boar of Europe 

 and a Wild Boar and Sow from Madras living side by side, and they 

 have all the appearance of being most distinct species, which may be 

 thus characterized : — 



SuS APER. 



Covered with crowded bristles, forming a crest on the withers ; 

 black speckled, with grey tips to the bristles ; the legs hairy, black ; 

 hoofs black. 



Hab. Europe, Germany. 



Sus Indicus. 



Covered with scattered, more rigid bristles, more abundant on the 

 front part of the body ; pale grey, blackish on the outside of the 

 shoulders ; legs slender, covered with a few bristles ; hoofs white. 



Female (perhaps half-bred). — Body rather more hairy ; the outer 

 front hoof of each hind foot black. 



Sus Indicus, Gray, Cat. Mam. B.M. 



Hab. India, Madras. 



The skulls of tlie Wild Hogs from Madras and the Himalaya in 

 the British Museum all appear larger, and have the hinder part of 

 the forehead not so high and dilated as in the common Domestic 

 Boar, much resembling the skull of the sows of that species. They 

 can scarcely be all from female animals of the Indian kind. 



I may observe that the nasal bones of this genus appear to elongate 

 and occupy a greater part of the length of the face in the adult than 

 in the young animal. In the young they seldom extend beyond a line 

 even with the large foramen on the side of the face, but in the adult 

 they are generally produced much behind it. 



Genus 2. Babyrussa. 



The ears rounded ; tail and limbs slender ; face conical, simple ; 

 the hinder upper part of the intermaxillary bone smooth ; the upper 

 canines (in both sexes) coming out from the side of the jaw and bent 

 upwards from the base, and then arched backwards, sometimes even 

 spirally recurved. Hab. The Indian islands. 



1. Babyrussa alfurus. 



Genus 3. Potamochcerus. 



The ears elongate, suddenly tapering and ending in a pencil of hairs; 

 face elongate, with a long protuberance on each side halfway between 

 the nose and the eye ; the tail thick, high up the rump ; the upper 

 part of the intermaxillary bone swollen, rugose ; the upper canines 

 arising from a prominent bony case on the side of the jaws, coming 

 out on the lower edge of the jaw and then recurved. Hab. i!Lfrica. 



Koiropotamus, Gray, Cat. Mam. B.M. xxvii. 

 Ann. ^ Mag. N. Hist. Ser.2. TW.xv. 5 



