32 MAMMALIA. 



abdominal sacs for their young. Though the different genera 

 of these are thus connected in this one particular, yet in the 

 form of their teeth some are found to correspond with the Car- 

 nivora, others with the Rodentia, and others resemble the 

 Edentata in the structure of their teeth and the nature of their 

 food. 



VI. PACHYDERMA, or thick-skinned animals. This order 

 includes all the quadrupeds with hoofs, except the ruminating 

 animals, though the elephant is only remotely connected with 

 this group. 



VII. RUMINANTIA, ruminating animals, (Pecora, Lin.) 

 These animals form a very natural family, and are distinguished 

 from all other quadrupeds by their cloven feet, the want of true 

 incisors in their upper jaw, and by their having four stomachs. 



VIII. CETACEA, Whales. Mammalia which have no dis- 

 tinct posterior extremities. These are the warm-blooded Jishes 

 of the ancients, which, to the strength of the mammiferae, unite 

 the advantage of being supported by water, and thus form the 

 most gigantic of animals. 



Since the publication of the Regne Animal, Latreille and 

 others have made a separate order of the Cheiroptera, the first 

 of the four families into which Cuvier divides his Carnassiers ; 

 and this separation seems natural and proper, from the other 

 families of the Order having their mammae ventral, while the 

 Cheiroptera, like the Quadrumana, are distinguished by pectoral 

 mammae. Cuvier himself suggests the propriety of arranging 

 the Marsupial animals, forming the fourth family of the same 

 order, into a separate group. In the following pages the ar- 

 rangement will therefore stand thus : 



ORDER I. BIMANA, ORDER VI. GLIRES, 



II. QUADRUMANA, VII. EDENTATA, 



III. CHEIROPTERA, VIII. PACHYDERMA, 



IV. FERJE, IX. RUMINANTIA, 



V. MARSUPIALIA, X. CETACEA. 



