THE EOCENE OF EUROPE AND NORTH AMERICA 



163 



in front by a pair of sharp caniniform teeth coated with enamel. The ar- 

 chaic edentate Stylinodon is doubtfully represented in this level. The 

 tillodont stage is Trogosus. 



Fig. 62. — A dostroyer of Middle Eocene smaller mammals and birds. Skeleton of the 

 slender-limbed creodont Tritemnodon agilis. In the American Museum of Natural History. 



Upper Bridger Levels C and D, Lower Washakie and Lower Uinta. — The 

 geographic distribution of these contemporaneous depositions is displaj^ed 

 on the map on p. 120. 



Fig. 63. — -Skok'ton of the Middl > Eocene tapir-like titanothere Paloeosyops Icidi/i. One of 

 the large mammals of the Orohippus zone. In the American Museum of Natural History. 



(1) Upper Bridger: Uintatherium Zone. — This level is marked by the 

 introduction of a number of new forms, including especially the great 

 ambljqood Dinocerata, w^hich are represented by species of Uintatherium 

 in various stages of evolution. These animals differ from Coryphodon in 



