ZOOLOGY 



Chabtopoda 



CHAPTER X 



PAGE 



138 



Gbphyrea 



CHAPTER XI 



159 



Brachiopoda 



CHAPTER XII 



. 169 



POLYZOA 



CHAPTER Xin 



179 



MOLLUSCA 



CHAPTER XIV 



. 189 



ECHINODEBMATA 



CHAPTER XV 



224 



CHAPTER XVI 



Arthropoda — Crustacea 



. 253 



CHAPTER XVII 



Prototracheata 



. 300 



CHAPTER XVIII 



Mtriapoda 



. 310 



CHAPTER XIX 



Insecta 



321 



CHAPTER XX 



Arachnida 



. 388 



CHAPTER XXI 



Chordata 



. 423 



