CONTENTS 



CHAPTER I 



PAGE 



Protozoa . . i 



CHAPTER n 

 Metazoa — Introductory Remarks : Coelenterata 84 



CHAPTER HI 

 Porifera 118 



CHAPTER IV 



Annelida . 129 



CHAPTER V 

 The Parasitic Worms 159 



CHAPTER VI 

 Arthropoda . 209 



CHAPTER VII 



Mollusca . ... . 267 



