UNGULATA. 



289 



Sub-Order 1. Condylarthra. 



These are the small generalized early Ungulata already 

 mentioned as most closely approaching the ancestors of the 



FIG. 164. 



Hijnicops (? Meniscotherium) socialis ; left fore (A) and hind (B) feet, nat. size. 

 L. Eocene ; New Mexico, a, astragalus ; c, calcaneum ; cb., cuboid ; 

 ce., centrale ; I, lunar ; m, magnum ; n, navicular ; p, pisiform ; li, radius ; 

 , scaphoid; td., trapezoid ; tm., trapezium; U, ulna; u, unciform ; x, 

 epicuneiform; 1 3, internal, middle, and external cuneiforms; i v, 

 numbers of digits. (After Marsh.) 



Carnivora. The brain is relatively diminutive, with smooth 

 hemispheres and the mesencephalon more or less exposed. 

 The teeth are brachyodont and bunodont (i.e. have a low 

 crown bearing tubercles), usually 44 in total number, and the 

 w. 19 



