122 THE WHITE RIVER BADLANDS 



ticularly the fore limb, and this in connection with the high 

 shoulder prominence, gives to the animal a peculiar stilted 

 appearance. The foot, fore and hind, has two functional toes 

 corresponding to the third and fourth of five toed animals. 

 The second and fifth are present, but only in rudimentary 

 form. Much that has been said in regard to the structural 

 features of the Elotheres applies also in a general way to the 

 Dicotylidae, but the latter represent a later development and 

 tend more definitely toward the modern peccaries. 



Figure 60 — Skull of Hyopotamus (Ancodus) brachyrhynchus. Scott, 

 1895. 



Concerning all of the forms, it may be said that they 

 with the Suidae were apparently derived from a common 

 Eocene ancestry. According to Matthew and Gidley the 

 peccaries originated in the new world and have always re- 

 mained here, while the true pigs (suinae) originated in the 

 old world and never of their own accord reached the new 

 world, their presence here now of the latter being due solely 

 to introduction by man since the discovery of America by 

 Columbus. 



ANTHRACOTHERIDAE 



The Anthracotheridae include species of an extinct 

 family of stoutly built, generalized, primitive animals, evi- 

 dently resembling to some extent the present day pig but 

 having some characters possessed by the hippopotamus. Their 

 nearest important relatives of White River time were ap- 

 parently the Oreodontidae. These they resembled very 

 closely. Scott states that the likeness as shown in the skull, 



