MAMMALS 



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oxen, sheep, deer, camels, pitjs, and hippopotami. The 

 Artiodactyls comprise two groups, the ruminants and 

 non-ruminants. All of the native Ungulata of our North- 

 ern States belongs to the ruminants, so called because of 



their habit of chewing a cud. A ruminant first presses 

 its food into a ball, swallows it into a particular one of 

 the divisions of its four-chambered stomach, and later 

 regurgitates it into the mouth, thoroughly masticates it. 



