THE EOCENE OF EUROPE AND NORTH AMERICA 



157 



(see p. 217) or 'giant pigs,' which are destined to play a very imposing 

 part in the Ohgocene of North America and Europe. The diminutive 

 selenodonts {Homacodon), provisionally referred to the European family of 

 Dichobunidifi, may represent an independent family (Homacodontidae). 

 The most novel American forms, also destined to be conspicuous in the 



WYOMING CONGLOMERATE 



Uintatherium 

 (very abundant) 



■TT- , -I • Mesatirhmus, 



Uvn.tatneT~LUTn Manieoceras 



Pglaeosyops 

 (very abundant) 



By permission of tlie U.S. Geological Survey. 

 Fig. 58. — Typical Middle Eocene of western Wyoming. Scale section of the Lower and 

 Upper Bridger Formation. Prepared by Matthew and Granger, 1903. 



future history of the continent, are the oreodonts (Oreodontidae) and the 

 pro-camels (Camelidae or Hypertragulidae). 



Geology of the Middle Eocene Bridger, Lower Washakie, and Lower Uinta 



Bridger. — These noble exposures in southwest Wyoming, discovered 

 in 1869, are the classic hunting grounds of Leidy, Marsh, and Cope, famous 



