26 DIVISION OF MAMMALIA INTO ORDERS. 



nous points which correspond in a manner, and are received 

 into the vacuities left between them, on the opposing teeth ; 

 (Plate 2, fig. 5.) and when the food of the animal consists prin- 

 cipally of the tender fruits, these teeth are simply armed with 

 blunt tubercles, (Plate 2, fig. 6. ) and when destined to grind 

 vegetable substances which are more or less hard, they are termi- 

 nated by a broad surface flattened and rough like that of a mill- 

 stone. 



DIVISION OF THE CLASS OF MAMMALIA INTO ORDERS. 



23. The class of mammalia is divided into nine orders, which 

 are easily distinguished one from the other, by the differences 

 observable in the conformation of their extremities, of their teeth 

 and some other organs. The chief characteristics of these 

 groups are indicated, in the following synoptical table of the 

 classification of the mammalia : 



23. How is the class of mammalia divided? How are these orders dis- 

 tinguished from each other ? 



O" (Questions answered in the table.} What are the characters of the 

 order Bimana? What characterises the Quadrumana ? What ia the num- 

 ber of their hands 1 



What characterises the order Carnaria ? Have they any hands ? 



What characterises the order Rodentia ? 



What characterises the order Edentata ? 



By what part of the animal is the order Marsupialia distinguished ? 



What characterises the order of Pachydermata ? 



What characterises the order of Ruminantia ? 



What is the conformation of the stomach in animals of the two last orders ? 



What characterises the order Cetacea ? 



