224 



UNGULATA 



ORDER VII 



reached a height of 2 metres and a length of almost 4 metres. They were, 

 therefore, almost as tall as elephants. Other smaller forms exceeded the 

 hippopotamus and rhinoceros only slightly in height. 



Uintatherium Ijeidy (Dinoceras Marsh; Odotomus Co^e) (Figs. 305-308). The 

 protuberances on the nasals are small and vertical, the spongy bony crests on 



Fig. 307. 



Uintatheriv.m iniraMle Marsh sp. Middle Eocene (Bridger beds), Wyoming, 

 left lower molar. 1/2. (After Marsh.) 



A, Upper cheek teeth. B, Last 



the frontals high and rising directly over the condyles of the lower jaw. The 

 powerful, upper canine closes outside a broad, rounded projecting process 

 on the lower jaw. The upper and lower molars and premolars have two 

 inwardly converging transverse ridges. The brain-cavity is very small. The 



Fig. 308. 



Uintatherium mirabile Marsh sp. Middle Eocene (Bridger beds), Wyoming. A, Left fore-foot. B, Left 

 hind-foot. i/g. as, astragalus. (After Marsh.) 



pelvis and extremities, on account of becoming adapted to serve similar functions, 

 are very like those of the Proboscidea. The hind-limbs are somewhat longer 

 than the fore-limbs. The feet are pentadactyl. Several species are known 

 from the Middle and Upper Eocene of Wyoming. 



Loxolophodon Cope (Tinoceras Marsh). Very similar to the preceding, but 

 with larger nasal protuberances, directed obliquely forward. The frontal 

 crests extend to a point behind the condyles of the lower jaw. Same horizon 

 and locality. 



Eobasileus Cope. From uppermost Bridger Beds, "Wyoming. 



[Table 



