30 



CASTOR. BEAVER. 



Generic Character, 



Denies Primores superiores 

 truncati, angulo transverse 

 excavati. 



Inferiores apice transversi. 



Molares utrinque quatuor. 

 Cauda longa depressa squa- 

 mosa. 

 ClavicuU perfectse. 



FronUteeth in the upper jaw 

 truncated, and excavated 

 with a transverse angle. 



In the lov^er jaw transverse 

 at the tips. 



Grinders on each side four. 



Tail long, depressed and 

 scaly. 



Collar-bones in the skeleton. 



COMMON BEAVER. 



Castor Fiber. C. cauda ovata plana calm. Lin. Syst. NaL 



Gmel.p, 124. 

 Chesnut-coloured Beaverj with flat ovate naked tail. 

 Castor castanei coloris^ cauda horizon taliter plana. Brias. 



Quadr. p. i^^. 

 Castor. Gesn. Quadr. 309. Aldr. dig. 277. 

 Le Castor. Buf. S. pi. 36. 

 Castor Beaver. Pennant Quadr. 2. p. 1 14. 



The Beaver is a native of the most northern 

 parts of Europe and Asia, but is found most plen- 

 tifully in North America. It is readily distin- 

 guished from every other quadruped by the re- 

 markable structure of its tail^ which is of an oval 

 form, nearly flat^ but rising into a slight con- 

 vexity on its upper surface^ perfectly void of hair, 



