EPIHIPPUS. 



689 



Epihippus, which made a further approach to the 

 horse type, in having the 2nd premolar more hke a 



Rudius Tibia 

 Pore Hind and and 



foot. foot. ulna, fibula. 



Lower 

 Upper molar. molar. 



Rfxent. 

 Equus. 



Pliocene. 

 Pliohippus. 



Protoliippus. 



.Miocene. 



Miohippus. 



Mesohippus. 



EoCEjNE. 



Orohippus. 



Fig. 643. — Evolution of the bones of the legs, below the elbow and stifle, and 

 molar teeth of the horse. {Aftei- Marsh). The fossil remains of Eohippus were 

 found, after Professor Marsh had made this table. 



molar than was the case in Orohippus, was found in the 

 Upper Eocene of Wyoming. As in Orohippus, the 3rd 



44 



