PREFACE 27 
upon some general considerations connected with 
the subject, 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. 
