350 DicoTYLiD-a:. 



Fam. 6. DICOTYLIDiE. 



Teeth 38 : — Cutting-teeth |- . f ; canines | . x ; premolars f . ^ ; 

 molars | . |. Tail short. Teats 2. 



Ohoeropotamidse, Owen, Odont. p. 559 (not characterized). 



Diootylidse, Gray, P. Z. S. 1868, p. 43. 



Dicotyles, Cuvier, Reg. Anim. i. p. 237, 1817 ; F. Cuv. Dent. Mamm. 



p. 210, t. 86 ; Owen, Odont. p. 559 ; Jiaird, Mamm. N. A. p. 627, 



t. ; FUzinger, Setigera, p. 429, 1864. 

 Notophorus, Fischer, Zoot. 1819. 



These animals do not breed with the Domestic Pig, or any of the 

 genus Sus. They have not been domesticated, and very rarely breed 

 in confinement. The two species, a male (Dicotyles lahiatus) and 

 female (Notophorus iorquatiis), bred together iti the Zoological Gar- 

 dens, 1864 ; they have only two teats, and have two at a birth. 



Mr. E. Gerrard, in the ' Catalogue of Bones of Mammalia in the 

 British Museum,' has pointed out that the Collared Peccary has six 

 and the White-lipped Peccary nine caudal vertebrae (p. 289). 



M. F. Cuvier, in ' Dent. Mamm.,' observes that his description of 

 the teeth is taken from the Peccary {N. torquatus), and the figure 

 from the Tagassu {D. labiatus) ; and he continues, " The hinder 

 molar of the lower jaw of J), labiatus is terminated by a single tu- 

 bercle as large as the others, and not by three small ones." — Dent. 

 Mamm. p. 211. I cannot see any difference in the form of the 

 crown of the last grinder of the two species. The teeth, like the 

 skull, are much the largest in D. labiatus. See description of den- 

 tition (Owen, Odont. p. 560). 



1. NOTOPHORUS. 



SkuU — side of the face in front of the orbit dilated, spread out, 

 deeply concave beneath ; the longitudinal ridge on the cheeks nearly 

 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 (Gw-rarcZ). 

 Notophorus, Gray, P. Z. S. 1868, p. 43. 



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 torquatus on tab. 5 is that of Dicotyles labiatus. 



Dr. Spencer Baird's figure of the skuU (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. 



