CONTENTS 
PAGE 
HELICID^ 1 
CARDIACS 27 
SOLENIDJE 39 
CYPRINIDJ2 43 
MYTILID^ 45 
OSTREADA2 68 
PECTINIDJE 98 
HALTOTID^ 114 
PATELLIDS 119 
MUKICIDjE 124 
LITTORINIDA^: 136 
AVICULID^ 139 
YENERID^ 143 
TELLINID^ 150 
MACTEIDJE 152 
MYAD.E 155 
PHOLADIDiE ,157 
SEPIADJE 163 
CIDARIDjE 176 
LIST OF WORKS REFERRED TO OR CONSULTED . . 181 
INDEX . 189 
