3G DR. J. E. GRAY ON THE SUID E. [Jail. 9, 



2. PoTAMOCHCERUs 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 

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



Skull. — Male, the prominence of the canine flat-topj)ed 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, sliort, 

 not reaching to the level of the upper surface of the nose. Female, 

 with only a ridge across the base of the sheath of the upper canine. 



Porcus guineensis, Marcgr. Bras. 230, fig. (good). 



" Cochon de guinee, Buffon, H. N. v. 146." 



Guinea Pig, Brown, Jam, 487. 



Sus porcus, Linn. S. N. 1032. 



Pore de guinee, Desm. Mamm. 391 ; Enc.Mcth. t. 39. f. 1 (from 

 Marcg.). 



Sus scrofa, var. porcus, Fischer, Syn. 423. 



Sus guineensis, Brisson, R. A. 109. 



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



Sus penicillatus, Schinz, Monogr. d. Siiugeth. t. 10; Rev. Zool. 

 1848, p. 152; Gray, P. Z. S. 18.V2, p. 132. 



Choiropotamus pictus. Gray, Ann. c& Mag. N. H. x. 280, 281. 



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



Sus p)ictus,W&^nev, Schreb. Saugeth. Supp. v. 302, 800. 



Potamocharus alLifrons, Uu Chaillu, Proc. Boston N. H. S. vii. 

 301, 1801 ; Travels, p. 422, t. 62 ; Gray, P. Z. S. 1861, p. 277. 



Potamocharus penicillatus. Gray, Ann. & Mag. N. H. xv. 66; 

 P. Z. S. 1852, p. 131, t. 34 ; Gerrard, Cat. Bones, B. M. 279 ; Fitz. 

 Kais. Akad. d. Wisseu. xix. 365 ; Sclater, P. Z. S. 1801, p. 62, t. 12 

 (adult and young). 



Hah. West Coast of Africa; Camaroons River; Guinea; natu- 

 ralized in Brazil (Marcgrave). 



Skeleton (no. 1363 «) of a male specimen, from the Camaroons, 

 that lived for several years in the Society's Gardens. The skull of 

 this animal is figured by Mr. Sclater in the ' Proceedings of the Zoo- 

 logical Society,' 1860, p. 301. The process un the base of the sheath 

 of the canine is much shorter than in the skulls of P. africanus 

 (1364 a, b) ; it does not reach the upper surface of the nose, is sub- 

 cylindrical at the base, without any keel on its outer side, and broad 

 at the end. It diverges much more from the side of the nose than 

 in the skull from South Africa. 



Two skulls, collected by Dr. Baikie in the interior of Africa 

 (1363 c and 1363 rf). They are very like the skull of the male 

 animal from the Camaroons (1363 a). The process of the sheath 

 of the upper canine in 1363 c is rather shorter and broader at the 

 top than in that skull ; and in 1363 a it is unfortunately broken off. 



With these skulls Dr. Baikie brought another without the lower 

 jaw (715 b), which is very like the others, only the side of the nose 

 over the canines is not dilated, and there is only a slight ridge across 

 the base of the uj^per surface of the sheath of the ujjper canine, as in 



