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 g cedar opus 

 10. Spondylus plicatula } 



Common Cockle. 



f Simpleton's 



\ Kneading-trough. 



Toothed Donax. 



Ribbed Venus. 

 Thorny Oyster. 

 Cat's Paw. 



Plicatula ramosa of Lamarck. 



