xu 



CONTENTS. 



ORDER I.— MULTIVALVES. 



Chiton 25 j Lepas 28 



Pholas ' 32 



ORDER II.— BIVALVES. 



Mya 35 



Solen 38 



Tellina 39 



Cavdium 42 



Mactra 45 



Donax 47 



Venus 49 



Spondylus 53 



Cliania 55 



Area 58 



Ostrea 60 



Anomia 67 



Mytilus 70 



Pinna 73 



ORDER III.— UNIVALVES. 



Argonauta 76 



Nautilus 78 



Conus 80 



Cyprsea 84 



Bulla 87 



Voluta 90 



Buccinum 96 



Strombus . . . . , 103 



Murex 106 



Trochus 113 



Turbo 118 



Helix 125 



Nerita 132 



Haliotis 135 



Patella 138 



Dentalium 142 



Serpula 144 



Teredo 146 



Sabella 147 



Explanation of the Plates 151 



