Vlll CONTENTS. 



INVERTEBRATES 



CHAPTER VII 

 PROTOZOA .... 



CHAPTER VIII 

 SPONGES ..... 



CHAPTER IX 



CCELENTERA . 



CHAPTER X 



UNSEGMENTED "WORMS" 



CHAPTER XI 

 ANNELIDS . 



CHAPTER XII 



ECIIINODERMS .... 



CHAPTER XIII 

 ARTHROPODA 



CHAPTER XIV 



ONYCHOPHORA OR PROTOTRACHEATA, MYRIOPODA, AND 

 INSECTA 



CHAPTER XV 

 ARACHNOIDEA AND PAL/EOSTRACA 



CHAPTER XVI 

 MOLLUSCS 



