342 suiD-E. 



the top of the nose ; it is thin on each edge, and thickened near the 

 outer hinder edge by a strong angular keel. 



2. A skull (1364 rt) that was purchased of Mr. Argent in 1851 

 as coming from ii-'outh Afiica. It has the process of the sheath of 

 the canines nearly as long as the preceding (1364 6) ; but it is not 

 so broad from side to side, and the outer surface is evenly rounded, 

 without any keel. This skull very nearly resembles the one figured 

 by De Blainville as that of Stfs lurvatus (Osteograph. t. 5), and the 

 skull figured by M. F. Cuvier (Mem. Mus.). 



3. A skull from the ]^Iuseum of Dr. de Jeude, probably from the 

 Capo of Good Hope (1364 c). 



The front of the lower jaw behind the canine is more dilated and 



swollen in P. larvatus (1364 6) than in the lower jaws of the two 



other skulls ; but they aU differ from each other more or less in this 



fespect. , 



^^' f> 4. A skull without its lower jaw (715 «) was brought home by 



\A 1^' Captain Alexander from his Expedition to Damara, and presented 



>J-^\/ to the British Museiim. It is recorded iji Mr. Gerrard's catalogue 



of the bones in the British Museum as Sits ccq'iensis (p. 277). It 



is the skull of an adiilt animal, with the crown of the grinders much 



worn. It is probably the skull of a female, as it agrees with all the 



characters of Potomochoerus, but it has only a well-marked ridge 



across the upper part of the base of the sheath of the upper canine, 



and the upper margin of the nose is not dilated or swollen. 



2. Potamoohcerus porcus. (Red River-Hog.) B.M. 



Ears densely hairy ; edges of ears and pencil white. Fur red- 

 brown, beneath greyish white. Head and ears black ; whiskers on 

 the cheek, streak over and below the eyes, and dorsal mane white. 



Sl-ull. — Male, the prominence of the canine flat-topped and not 

 raised above the surface of the nose ; the lateral process of the 

 sheath of the upper canine narrow at the base, dilated above, short, 

 not reaching to the level of the upper surface of the nose. Fe- 

 male with only a ridge across the base of the sheath of the upper 

 canine. 



Porcus guineensis, Marcf/r. Bras. p. 230, fig. (good). 



" Coclion de giiinee, Buffun, H. N. v. p. 146." 



Guinea Pig, Broun, Jam. p. 487. 



Sus porcus, Linn. S. N. p. 1032. 



Pore de guinde, Desm. Mamm. p. 391 ; Enc. Meih. t. 39. f. 1 (from 



Marcg?). 

 Sus scrofa, var. porcus, Fischer, Si/n. p. 423. 

 Sus guineensis, Brixson, i?. A. p. 109. 

 Sus africanus, Smith ; GriJAfh, A. K. (not Desm.). 

 Sus penicillatus, Sv/tinz, Monor/r. d. Siiuyeth. t. 10; Rev. Zoul. 1848, 



p. lo2 ; Gray, F. Z. S. 1852, p. 132. 

 ChoiropotaAus' pictus, Crray, Ann. Si- Mag. N. H. x. pp. 280, 281. 

 Painted Pig of the Camaroons, lUustr. London News, fig., 1852. 

 Sus pictus, Wagner, Schreh. Sauf/ctJi. Siipp. v. pp. 302, 800. 

 Potaniochoerus albifrona, Du Chaillu, Proc. Boston N. H. S. vii. p. 301, 



1861 ; Travels, p. 422, t. 62 : Gray, P. Z. S. 1861, p. 277. 



