514 



THE WASATCH AXD BRIDGE R FAU?f^. 



described in the Systematic Cataloo^ue of the Vertebrata of the Eocene of 

 New Mexico (April, 1875). 



The Pantodonta are confined, so far as discoveries extend at present, to 

 the Lower Eocene or Wasatch beds, in tlie Rocky Mountain region, while 

 the Dinocerata are confined to the higher or Bridger Eocene strata. The 

 former suborder includes three genera, Bathmodon Cope, Coryphodon Owen, 

 and Metalopliodon Cope; the Binocercda four, Batlujopsis Cope, Uintathe- 

 riiim Leidy, Eohasileus Cope, Loxolophodon Cope. 



I have anticipated* the discovery oi Amhlypoda with tubercular teeth 

 No such have yet been found, but the probability of such discovery 

 remains as strong, in my opinion, as at the time I ventured to suggest it. 



PANTODONTA. 



As already pointed out, the structure of the limbs and feet in this sub- 

 order is as in the order generally, and the scapula has the same form in 

 general. The symphysis mandibuli is furnished with teeth, and forms a 

 long solid spout. The astragalus has a very peculiar form, being even 



Fig. 21. Skull of t'ori/j)/iorfo« eh-phantojiun, displaying braiu-ca'^ity, g nat. size. 



more exceptional than in Uintatheriiim. The superior articular surface is 

 flat or concave in the middle. It is turned inward in front of the articular 

 face for the inner malleolus, terminating in a long point. The cuboid 

 ax-ticular face is quite small and sublateral, and sessile like the navicular. 



* Jour. Acad. Nat. Sci. 1874, March, "On Homologies of Molar Teeth of Mammalia Edncabilia", 

 p. 20. 



