TABLE OF CONTENTS 



Page 



Introduction v 



Instructions for Collecting Mollusks 4 



Univalves — Position for Study 11 



Bivalves 15 



Class Amphineura 22 



Class Pelecypoda 25 



Class Scaphopoda 71 



Class Gastropoda 74 



Class Cephalopoda 148 



Plates 151 



Glossary of Descriptive Terms and General Index 303 



Index of Genera, Subgenera, and Sections 307 



vii 



