CONTENTS. 
BIVALV ES. 
Tue OYSTER. 2 ‘ c 5 ‘ - 
PEARLS. : ‘ 3 ; : e 
Tue MussEL AND THE COCKLE , F A 
ScaLLOP SHELLS . : : ; . ‘ 
LIMPETS 
ROockK-BORERS a 
MULTIVALV ES: 
THE CHITONS ‘ 2 : A ‘i 
BaARNACLES 
CurtiLeE-FIsu , 
NAUTILUS AND AMMONITE ‘ 3 ‘ ; 
SHELLS OF COMMON OCCURRENCE. 
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