36 THE AMERICAN MUSEUM JOURNAL 



LagomyiD/E. Picas, or Tailless Hares. 



These are little animals looking like small Rabbits, but have 

 fewer teeth. They are found in high mountain regions in the 

 Old World and likewise in western North America. They have 



p.2 3 4 m.l 2 3 



FIQ. 26. SKULL OF PAL/EOLAGUS 



An .nncestor of the hares. Oligncene of Colorado. Natural size 



been found fossil in Europe, but in America occur only in the 

 latest geological epoch; in the Old World they seem to have 

 taken the place of the true Hares, which were limited to the New 

 World until the end of the Tertiary period. 



V. MARSUPIALIA. 



All the living marsupials are inhabitants of Australia and the 

 adjacent islands, except the Opossums and a rare genus of Rat- 



FIQ. 27. SKULL OF THE OPOSSUM 

 Shows the peculiar dentition of the marsupials. Half n.ttural size 



Kangaroos from South America. In Australasia they take the 

 place of the mammals of the other continents, none of which occurs 



