CONTENTS. 



BIVALVES. 



PAGE 



The Oyster 74 



Pearls .87 



The Mussel and the Cockle • • 92 



Scallop Shells 102 



Limpets 105 



kock-boeees # 108 



MULTIVALVES. 



The Chitons Ill 



Barnacles • 113 



Cuttle-Fish 119 



Nautilus and Ammonite . 124 



SHELLS OF COMMON OCCURRENCE. . 136 



