92 NEW YORK STATE MUSEUM 



Castor canadensis Kuhl American beaver 



Flat space on top of skull between eye sockets distinctly longer tban 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 Hmits. 



SUBSPECIES OF CASTOR CANADENSIS 



Scaly portion of tail more tban twice as long 



as wide C. canadensis canadensis 



Scaly portion of tail less tban twice as long 



as wide C. canadensis carolinensis 



Castor canadensis canadensis Kuhl Northeastern beaver 



1820 Castor canadensis Kubl, Beitrage zur zool. u. vergl. auat. p. 64. 



(Eastern Canada) 

 1898 Castor canadensis Rboads, Trans. Am. pbilos. soe. n. s. Oct. 



1898. 19:418. 

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

 Total lengtb, 1100 (35); tail vertebrae, 410 (16i) ; bind 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 Rboads, Trans. Am, pbilos. 

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

 Scaly portion of tail less than tivice as long as ivide; pelage relatively short 

 andbarsb. Total lengtb, 1100 (35) ; bind 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 J?ats, miee, etc. 



Front teetb two ; cbeek teetb never more tban three in eaeb jaw. In tlie species 

 that occur ivithin our limits the fur is without spines or hristles, and tbe bind 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 loo genera, many of which are American, ii occurring within our 

 limits. 



