92 NEW YORK STATE MUSEUM 



Castor canadensis Kuhl Ainerican beaver 



Flat space on top of skull between eye sockets distinctly longer than broad, 

 {canadensis; N. Lat., Canadian) 



The American beaver, which occurs throughout the wooded parts of 

 North America, is divisible into four or more races, two of which are 

 found within our limits. 



SUBSPECIES OF CASTOR CANADENSIS 



Scaly portion of tail more than twice as long 



as wide C. canadensis canadensis 



Scaly portion of tail less than twice as long 



as wide C. canadensis carolinensis 



Castor canadensis canadensis Kuhl Northeastern beaver 

 1820 Castor canadensis Kuhl, Beitrage zur zool. u. vergl. anat. p. 64. 



(Eastern Canada) 

 1898 Castor canadensis Rhoads, Trans. Am. philos. soe. n. s. Oct. 



1898. 19:418. 

 Scaly portion of tail more than twice as long as wide ; pelage long, full and soft. 

 Total length, 1100 (35); tail vertebrae, 410 (16^); hind foot, 175 (61). 

 (canadensis; N. Lat., Canadian) 



The northeastern beaver was formerly an inhabitant of the wooded 

 banks of lakes and watercourses in the Hudsonian and Canadian zones of 

 eastern Canada and the northeastern United States. It has been exterm- 

 inated south of the Canadian border. 



Castor canadensis carolinensis Rhoads Southeastern beaver 

 1898 Castor canadensis carolinensis Rhoads, Trans. Am. philos. 

 soc. n. s. Oct. 1898. 19:420. 

 Scaly portion of tail less than twice as long as wide ; pelage relatively short 

 andharsh. Total length, 1100 (35) ; hind foot, 180 (7). (carolinensis; N. 

 Lat., Carolinian) 



The southern beaver inhabits the austral zones of the eastern United 

 States. Its range is now restricted to the wilder foothills of the southern 



Alleghanies. 



Family Muridae Rats, 7?iice, etc. 



Front teeth two ; cheek teeth never more than three in each jaw. In the species 

 that occur within our limits the fur is without sjnnes or bristles, and the hind feet 

 and legs are never greatly elongated for jumping. (Muridae; genus Mus) 



The family Muridae, which includes more than one third of the 

 existing rodents and a greater number of species than any other family 

 of mammals, is cosmopohtan in distribution. It probably contains more 

 than IOC genera, many of which are American, ir occurring within our 

 limits. 



