VI 



CONTENTS. 



ORDER I.— MULTIVALVES. 



Chiton Page 17 | Lepas Page 20 



Pholas 24 



ORDER II.— BIVALVES. 



Mya 27 



Solen 29 



Tellina 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 



Cyprsea 75 



Bulla 79 



Voluta 82 



Buccinum 87 



Strombus 92 



Murex , . . . . 96 



Trochus 102 



Turbo 107 



Helix 113 



Nerita 119 



Haliotis 123 



Patella 126 



Dentalium 132 



Serpula 135 



Teredo 138 



Sabella 139 



Explanation of the Plates 141 



