52 BIVALVES——CHAMA. 
Famity 6.—Heart shaped, umbones prominent and apices spirally 
recurved. 
Scientific Name. Locality- Common Name. 
Cor -sseeeeee ee Mediterranean, France, 
Bantry Bay ---- -+--- Heart Clam --- 
Moltkiana------- China «cece ccccccs cece Moltkian’s:-do -- 
Division II.—Shell inequivalve. 
Lazarus--»»+.--- Mediterranean, West In- 
dies, China ---- --.-. Lazarus -- do -- 
Gryphoides ----- East & West Indies, Medi- 
terranean, Africa ----- Gryphus -+ do -- 
Cornuta -------- Mediterranean-------+-+ Horned---- do -- 
Sessilis---++--+++- W. Indies, Mediterranean Scaly--++-- do -- 
Buamellosa): si: 0% stewie coe c'e'e'e veces cee ecee Lamellar -- do -- 
Punctata+-+-+++- Guadaloupe --++-----+-- Dotted ---- do -+ 
Sinistrorsa------- East and West Indies---- Reversed ++ do - 
Arcinella------+- Ditto, Brazils ---.-----. Hedgehog - do -- 
* Ponderosa ----- South Seas «ecescccccces Heavy-++:: do -- 
