PLATE IX. 



FIG. 



1. Hinge of Ohama. 



2. Chama hippopus l 



3. Chama cor 2 . . 



4. Hinge of Area. 



5. Area undata 3 . 



6. Area Noce .. 



7. Ostrea violacea 4 



8. Ostrea malleus 6 . 



Bear's Paw Clam. 

 Heart Clam. 



Lettered Ark. 

 Noah's Ark. 

 Violet Scallop. 

 HammerOyster. 



1 Hippopus maculatus of Lamarck 



2 Isocardia cor ditto. 



3 Pectunculus undulatus ditto. 



4 Pecten violacea ditto. 



5 Malleus Vulgaris ditto. 



6 Terebratula psittacea ditto. 



