THE NEARCTIC REGION 



157 



Region only by a single species of armadillo (Tatusia 

 novem-cincta), which almost certainly came up from the 

 south, and is only met with just inside the southern borders. 



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W 



1 



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Fig. 31.— The Rocky-mountain Goat. 

 {Hajrfoccros montanus.) 



Among the Ungulates, the most remarkable form is the 

 prong-buck (Antilocapra), which forms a distinct family of 

 that order, and is entirely confined to this Region (Fig. 30, 

 p. 156). It is allied in some respects to the Antelopes of the 



