CONTENTS. XI 



Page. 



Strombus • 72 



Murex 76 



Trochus 82 



Turbo ' 87 



Helix 92 



Nerita 98 



Haliotis 102 



Patella 105 



Dentalium - Ill 



Sei-pula c 113 



Teredo 117 



Sabella 118 



Explanation of the Plates 123 



