PART I. 



ZOOLOGY. 



THE NATURAL FAMILIES OF THE ANIMAL KINGDOM, ARRANGED 

 ACCORDING TO THEIR ORGANIZATION. 



THE ANIMAL KINGDOM. 



In pursuing the study of the Animal Kingdom, two 

 different methods may be followed. The one named 

 the Zoological, considers more especially the classi- 

 fication and arrangement of living creatures from 

 their external configuration and general shape ; the 

 other, by the aid of Comparative Anatomy, directs 

 attention more particularly to their internal struc- 

 ture and physiological analogies. To obtain a com- 

 plete acquaintance with the subject, both plans of 

 research must be adopted, but by those whose time 

 and opportunities are too limited for such a compre- 

 hensive study, either of these two branches may be 

 followed out, without totally losing sight of the other. 

 The latter is most successfully studied at home, 

 while the former is of greater consequence to the 

 travelling naturalist, for whose behoof this work is 

 intended. In describing therefore the various classes, 

 orders, and families, attention will be paid more par- 

 ticularly to external configuration, and the leading 



