32 LECTURE II. 



muscles and tendons without any internal joints or 

 bones. 



The arms, or offensive and defensive weapons 

 of the Mammalia, besides the claws and teeth, 

 (which will be afterwards particularized,) are prin- 

 cipally the horns; inserted in various directions, 

 and on different parts in the different tribes. The 

 horns are either perennial or annual. In the Rhi- 

 noceros the horn is perennial, and situated on the 

 top of the nose. In the Deer tribe the horns are 

 annual, branched, covered while young, with a soft 

 villous skin or coat; they grow from the tip, and 

 become very solid and strong at their full size. In 

 the Ox tribe, as well as in the Sheep and Goat, they 

 are hollow, mounted on a bony core, and grow 

 from, the base. Besides the assistance which they 

 derive from horns and claws, the Mammalia have 

 many other modes of defence, which they occa- 

 sionally exert; and sometimes even deter their 

 enemies by their voice or their scent, of which we 

 have many curious examples in the history of par- 

 ticular animals. 



The Teeth in Quadrupeds or Mammalia are of 

 three kinds. [ . Front or Cutting-Teeth, of a broad, 

 compressed structure, designed for cutting their 



