190 



RODENTIA. 



CASTOR1DM. 



Fig. 74. 



nat. size. Fens, Cambridgeshire. 



CASTOR EUEOP^EUS. European Beaver. 



Castor des tourbieres, 

 Castor fossilis, 



Trogontlierium Werneri, 



CUVIER, Ossem. Fossiles, v. pt. 1. p. 55. 

 GOLDFUSS, Nova Acta Acad. Nat. Cur. torn. xi. pt. 2. 



p. 488. 

 FISCHER, Memoires de la Soci6te des Naturalistes 



de Moscou, torn. ii. p. 250. 



THAT the present European Beaver is not the degenerate 

 descendant of the great Trogontherium, is proved, not only 

 by the differences in the dental structure pointed out in 

 the preceding section, but likewise by the fact that Beavers, 

 in no respect differing in size or anatomical characters from 



