BIVALVES CARDIUM. 31 



Family 2.— Ribs armed with nodules, elevated rough strice, wrinkles 

 or scales. 



Sdeiitific Name. Locality. Common Name. 



Edule Britain Common Cockle • 



Unedo India - Strawberry Heart 



Fragum Ditto White strawberry 



Hemicardium-.-- Ditto • Heart shaped C •• 



Tuberculatum • • • Mediterranean Tuberculaled do • 



Isocardia East & West Indies Imbricated do • • 



Pectiniforme Pecten do • • 



Regulare West Indies Regular • • • do • • 



Glaucum Mediterranean Chanielion do-> 



Fasciatum Britain Banded do • • 



Elongatum Ditto Lengthened do •■ 



Leucostomum West Indies White mouth'd C 



Magnum Great do • • 



Rigidum Rigid do • • 



Maculatum Ceylon Spotted do • • 



Family S. — With ribs armed, more or less spined. 



Flavum Ceylon 



Spinosum Mediterranean 



Echinatum Ditto, Britain 



Lima East Indies • 



Muricatum West Indies 



Rugatum East &, West Indies 



Latum East Indies 



Ciliatum Greenland 



Aculeatum Britain 



Muricatulum • • • • Coast of Kent 



Family 4. — With ribs unarmed. 



Costatum Africa High ribbed do 



Medium West Indies, Britain Marbled • • do 



Donaciforme • • • • West Indies • • • Triangular • do 



Exiguum Britain Pigmy do 



