PLATE VIII. 



FiG. 



1. Hinge of Cardium. 



2. Cardium edule 



3. Hinge of Mactra. 







4. Mactra stultorum. 



5. Hinge of Donax. 



6. Donax denticulata . 



7. Hinge of Venus. 



8. Venus dysera . ; . 

 9* Spondylus gcedaropus 



10. Spondylus plicatula l 



Common Cockle^ 



( Simpleton's 



( Kneading-trough. 



, Toothed Donax. 



Ribbed Venus. 

 Thorny Oyster. 

 Cat's Paw. 



1 Plicatula ramosa of Lamarck. 



