CONTENTS. 
INTRODUCTION. page 
Definition of Zoology 1 
Method of Study 1 
Classification 2 
Paleontology 4 
Geographical Distribution 4 
How to Begin the Study of Zoology 5 
CHAPTER I. 
Branch 1. Protozoa 6 
CHAPTER II. 
Branch 2. Porifera (Sponges) , 15 
CHAPTER III. 
Branch 3. Coelenterata (Hydroids, Jelly Fishes, and Polypes) 19 
CHAPTER IV. 
Branch 4. Echinodermata (Crinoids, Starfish, Sea-Urchins, 
etc.) 87 
CHAPTER V. 
Branch 5. Vermes (Worms) 47 
CHAPTER VI. 
Branch 6. Mollusca (Bivalves, Snails, Cuttles) 66 
CHAPTER VII. 
Branch 7. Arthropoda (Crustaceans and Insects) 78 
CHAPTER VIII. 
Branch 8. Vertebrata 133 
