RISE AND PROGRESS OF ZOOLOGY. Hx 



same as in Class V., except no antennae ; but 

 tentacula. 



He then gives the natural characters at large 

 of each class, taking in with the above in- 

 ternal structure all differences arising from the 

 organs of respiration ; from the jaws or man- 

 dibles ; from the organs of generation and sen- 

 sation ; from the teguments ; and the fulcra, 

 as legs, wings, fyc. 



At the head of each class is given a short 

 description of the classical character, so framed 

 as to include an explanation of all the terms 

 appertaining to that class. 



Our author then subdivides the Mammalia 

 into seven orders. The distinctions of these 

 in this artificial arrangement are taken from 

 the difference in the number, form, and situa- 

 tion of the three kinds of teeth : namely, the 

 incisors, the canines, and the molars. But he 

 does not neglect the feet, making a systematic 

 division of the orders into digitated and hoofed 

 animals, and such as are destitute of hoofs and 

 claws. 



We shall give the characters as they stand 

 at the head of each order, and then enumerate 

 the genera. 



