THE NEARCTIC REGION 



169 



Such, for instance, are Rangifer (the Reindeer), Alces (the 

 Elk), Haploceros (the mountain goat), Gulo (the glutton), 

 and many others. 



The following table, which gives a summary of the 

 genera of this Sub-region, differs only from the summary of 

 the Canadian Sub-region in the omission of the heading 

 "Arctic and Palsearctic," since practically all the genera 

 common to this Sub-region and the Palsearctic Region are 

 also found in the Canadian Sub-region. 



Section VI. — The Eastern or Humid Sub-region 



So far as peculiar forms go, the Eastern Sub-region is 

 quite the least peculiar of the three. It contains only one 

 genus strictly confined within its limits ; this is Neofiber, 

 with a single species commonly known as the " Round-tailed 

 Musk-rat." This Rodent is found only in Florida, and is 

 much less completely aquatic in its habits than the true 

 Musk-rat (Fiber), which is spread over the rest of North 

 America. 



Taking the orders seriatim, the Marsupials are repre- 

 sented by the widely spread Virginian Opossum ; but the 

 Edentates do not reach the Region at all. Of the Ungulates 



