()id<i\. Ungulata. 



Fam. I. I>ic*<>tylidae. 



Snout elongated, truncated, flat terminal naked surface in which 

 the nostrils are situated. Stomach complex: cifcum present. 



Sub. Fam. I. Dicotylinae. 



2<J. I)i<'<>tyles. 



I. -:zi; C. ~; P. '"'; M. ^^ = 38. 

 3-3 i-i' 3-3' 3-3 ■' 



Dicotyles. Cuv. Regn. Anim., i, 1817, p. 237. 



Incisor rooted; upper canines pointed downwards, with sharp 



cutting edges. Four toes on fore feet, three on hind feet. Upper 



outer incisor and anterior premolar of both jaws wanting. Third and 



fourth metapiodials united at their upper ends. Ears small, erect. 



Bodv covered with bristly hair. Musky gland in middle of back. 



49. tajacu. (.S//J), Linn. Syst. Nat., i, 1766. p. loj. 



Type locality. Mexico. 



GfOf;r. Distr. Red River of Arkansas, latitude 34 south through 

 Mexico, Central and South America to the Rio Negro of Patagonia. 



iienl. Char. A white collar on either side of tlie neck; size 

 small. 



Color. Hairs bristly, banded with black and white, the tips being 

 always black, making the upper parts and sides appearing a mixed 

 black and white. Black predominates on face, along the mane and 

 the median line of the dorsal region. The throat, underparts, legs. 

 ears and a patch behind ears, nose and hoofs black. Band extend- 

 ing from either side of neck over shoulders and meeting on back 

 whitish; legs dark brown, sometimes the sides of hoofs are horn color. 



.\fiasiirc-menls. Total length, 865; head, 280; height at shoulder, 

 S13: tail vertebrae, 12. 



Fam. II. Cerviilae. 



Antlers solid, always present on the male, sometimes on the 

 female, first molar in upper and lower jaws brachyodont; lach- 

 rymal bone prevented from articulating with the nasals by an exten- 

 sive anteorbital vacuity; lachrymal duct with two orifices at or inside 

 rim of orbit; lateral hoofs nearly always present on all of the feet. 

 Upper canines generally present; no gall bladder. 



