44 DR. J. E. GRAY ON THE STJID^. [Jftll. 9, 



parallel with the tooth-line ; orbit small, incomplete behind, with a 

 concave half ring beneath, on the cheeks and upper part of the front 

 of the zygomatic arch ; occipital end much dilated on the sides, 

 forming a case for the hinder part of the temporal muscle. Teeth 

 moderate. Tail rudimentary ; caudal vertebrae six (Gerr«rc?). 



De Blainville's figure of the skull on the skeleton (Onguligrades, 

 Sus, t. 3) is not characteristic ; the concavity in front of the lower 

 part of the orbit is not sufficiently marked. The skull figured as 

 that of Sus torqvatus on tab. 5 is that of Dicotyles labiatus. 



Dr. Spencer Baird's figure of the skull (t. 87) is much shorter 

 and more ventricose than any of our specimens ; the form of the 

 ridge on the cheek is very imperfectly represented. 



NoTOPHORUS TORauATUs. Peccary. B.M. 



Black-brown, yellow-washed ; neck and shoulders with a white 

 streak. 



Sus tajacu, Linn, S. N. i. 103. 



Sus tajassu, Erxleb. S. R. A. i. 188. 



Sus torquatus, Blainv. Osteogr. Onguligr. Sus, t. 3 (skull), t. 8 

 (teeth). 



Dicotyles torquatus, Cuv. R. A. i. 23/ ; F. Cuv. Dent. Mam. t. 86. 

 f. 1 ; Mamm. Lithogr. i. t. ; Fitz. 1864, p. 49; P. Z. S. 18.59, 

 p. 51, 1860, pp. 181, 206, 242, 262, 417, 443; Baird, M. N. A. 

 627; Blainv. Osteogr. t. 3 (skeleton), t. 5 (skull). 



D. minor, Schinz, Cuv. Thierr. iv. 511 (jun.). 



D. tajacu, Gray, List Mamm. B. M. 186 ; Gerrard, Cat. Bones 

 B. M. 280. 



Cuche, Oviedo. 



Vagassou, Lerius, Nav. in Bras. 115. 



Saynos, Acosta, H. N. Indias, 287. 



Zainus sive Tajacu, Jonst. Quad. 107, t. 46. 



Tajacu, Piso, Ind. 98, fig. ; Rai. Syn. Quad. 97. 



Peccary, Wafer, Voy. 222. , 



Musk hog, Tyson, Phil. Trans, cliii. p. 359 ; Hill, Anim. 572. 



Pecari ou tajacu, Buffon, H. N. x. 21, t. 3. f. 27, t. 5. f. 13. 



Mexican hog, Penn. 



Pecari, Shaw. 



Hab. South America : Mexico, Red River, Arkansas, Guiana, 

 Brazil, Paraguay, Peru, California {Baird). 



Notophorus torquatus had a young one in 1860, the first occasion 

 that the animal has bred in confinement in England (Sclater, P. Z. S. 

 1860, p. 443). 



The skulls of the three old [males ?], having large canine teeth, 

 are rather larger than the other, and they have a well-marked ob- 

 long slightly sunk concavity in front of the orbits. 



One adult skull, in the Museum, with large short thick canines, 

 has this part of the skull, which is concave in the three other skulls 

 above referred to, flat. 



The angle of the lower jaw in the old skull becomes much di- 



