CONTENTS. 



[NTRODUCTION. pao« 



Definition of Zoology 1 



Method .if Study 1 



Classification 2 



Paleontology 4 



raphical Distribution 4 



How to Begin the Study of Zoology 5 



CHAPTER I. 

 Branch 1. Protozoa G 



CHAPTER II. 

 Branch 2 Porifera (Sponges) 15 



CHAPTER III. 

 Branch 3. Coelenterata (Hydroids, Jelly Fishes, and Polypes) 19 



CHAPTER IV. 



Branch 4. Ecbinodermata. (Crinoids, Starfish, BeaUrcbins, 



etc.) 37 



CHAPTER V. 

 Branch 5. Vermes (Worms) 47 



CHAPTER VI 



Branch G. Molluscs (Bivalves, Snails, Cuttles) Gfi 



CHAPTER VII. 

 Branch 7. Arthropods (Crustaceans and Insects) 78 



CHAPTER VIII. 

 Brancr 3. Vertebrata 133 



