VI 



CONTENTS. 



ORDER I.— MULTIVALVES. 



Chiton Page 17 | Lepas Page 20 



Pholas 24 



ORDER II.— BIVALVES. 



Mya 27 



Solen 29 



TeUina 31 



Cardium 34 



Mactra 37 



Donax 39 



Venus 41 



Spondylus 45 



Chama 47 



Area 50 



Ostrea 52 



Anomia 58 



Mytilus 62 



Pinna 65 



ORDER III— UNIVALVES. 



Argonauta 68 



Nautilus 70 



Conus 72 



Cjrpraea 75 



Bulla 79 



Voluta 82 



Bucciniun 87 



Strombus 92 



Murex , . . . . 96 



Trochus 102 



Turbo 107 



Helix 113 



Nerita 119 



Haliotis 123 



PateUa 126 



Dentalium ]32 



Serpula 135 



Teredo 138 



Sabella 139 



Explanation of the Plates 141 



