CONTENTS 



Preface 



Vll 



PART I: HOW TO KNOW SHELLS 



n 



How to Know Shells . . . . 

 The Balanced Aquarium and the Snailery 



3 

 9 



PART II: THE UNIVALVES AND CHITONS 



CLASS GASTEROPODA 



I A Typical Univalve Mollusk 



II The Murex Shells. Rock Shells 



III The Oyster Drill . 



IV The Purples. Dog Winkles 

 V The Tritons and Frog Shells 



VI The Spindle Shells and Band Shells 



VII The Whelks. Trumpet Shells . 



VIII The Basket Shells. Dog Whelks 



IX The Chank Shells . 



X The Volutes and Melon Shells . 



XI The Mitre Shells . 



XII The Margin Shells . 



XIII The Olive Shells. Rice Shells. Harp Shells 



XIV The Dove Shells . 

 XV The Cross-barred Shells . 



21 



27 



38 

 42 



49 

 56 



61 



71 

 76 



79 



87 



89 



91 

 100 



103 



