PKEFACE. 27 



upon some general considerations connected with 

 the suhject, for the purpose of tracing the rela- 

 tions of the animals he is about to describe, but 

 more especially of recording those facts and ob- 

 servations, connected with the general subject, 

 which he has derived from the study of the spe- 

 cies belonging to this country. These are ar- 

 ranged under distinct heads, and are treated of 

 in the following chapters of the Introduction. 



