vi CONTENTS. 



II. BIVALVES. 



Mya 24 



Solen 27 



Tellina 29 



Cardium 32 



Mactra •. 35 



Donax - 87 



Venus 40 



Spondylus 44 



(^hania 46 



Area 49 



Ostrea •• 51 



Aiiomia b^ 



Mytilus Cl 



Pinna 65 



III. UNIVALVES. 



Argonauta - • 68 



Nautilus 70 



Conus 72 



Cypraea 76 



Bulla • 80 



Volula 84 



Buccinum 89 



Stronibus 96 



