FOSSIL MAMMAL GALLERY. 
73 
western portion of the United States of America. This animal 
combines in some respects the characters of a Ehinoceros with 
those of an Elephant, and has others altogether special to itself. 
The group to which it belonged became extinct in the Miocene 
period, without leaving any successors. 
Near the pavilion is a skeleton (fig. 45) of a recently Sea-Cows. 
extinct and interesting animal, the Northern Sea- Cow {Ehytina 
gigas or stelleri), the last resort of which was Bering Island 
in the North Pacific, where it was completely exter- 
minated towards the close of the eighteenth century. 
