BOOK V. 



INVERTEBRATE ANIMALS. 



SECOND .BRANCH :-^MOLlD8CA. 



OLASS I.-CEPHALOPODA. CLASS II.-PTEROPODA. CLASS IH.-GA1. 

 TEROPODA. CLASS IV. ACEPHALA. CLASS V. BRA- 

 CHIOPODA. CLASS VI.-CIRRHOFODA. 



