CLAMS AND COCKLES 



1 Tapesliterata. 3 



2 Dnsinia discus. 4 



Tivelacrassatelloides (much reduced). 5 



Ta pes staminea. 6 



Cyrena Carolinensts. 

 Sphcsrium sulcatum. 



7 Cardiut)! quadttgenenum. 



8 Isocardia cor. 



