Animals Before M 



an 



mammals were tliose belonging to the genus 

 (Jintatherium (Uinta animal), thus named be- 

 cause their bones are found in the rocks of 

 that formation. These animals averaged about 

 the bulk of a rhinoceros, some smaller, some 



Skull of Uintatherium, the largest land mammal of 

 the Eocene. 



a little larger, but, like the other early mam- 

 mals, they were more or less flat-footed. The 

 most noticeable feature about them is the skull, 

 which bears three pairs of knobs or promi- 

 nences of various sizes, the foremost pair, on 

 the nose, being small, and the hindmost pair, 



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