54 PRIMEVAL MAN. 



divided all the animals whose young are 

 suckled {Mammalia), one is distinguished from 

 the others by the prehensile character of 

 both feet and hands {Qtiadriimand) ; another 

 Order is distinguished by the nature of its 

 food (Carnivora); the third is distinguished 

 by peculiarities in the production of the young 

 {Marsupialia)\ the fourth and fifth are distin- 

 guished by the nature of their teeth [Rodentia 

 and Edentata); the sixth are distinguished by 

 the texture of their skin {Pachydcrmata) ; 

 the seventh by peculiarities of the digestive 

 system (Ruminantid) ; and the last by the 

 fish-like form and fish-like habitat of the 

 Whales and Dugongs {Cetaced). Now, although 

 it is obvious that no one principle of classifi- 

 cation is consistently adhered to in this system, 



