18 BIVALVES— MYA. 
Scientific Name. Locality. Common Name. 
Nodosa --+++---- Riversof India..-----+-+ Knobbed - do :- 
Syrmatophora--+» Riversof Guinea ------+ Angular -- do -- 
Suborbicularis--- Coasts of Devonshire-+-- Roundish -- do -- 
Ineequivalvis ---- Coasts of Britain-------- Inequivalve do -- 
Labiata-+--+--+- South American Rivers:- Lipped --- do -- 
Aurita -+-++-eeee- Ganges slatelisialieisieiele\alsleievels Eared -:-+ do - 
Division [V.—Hinge toothless, with a conical rounded hollow for 
the reception of the cartilage. 
Vulsella -------- Amboyna, Tranquebar -- Tweezer -- do -- 
