62 BIVALVES —OSTREA. 
Scientific Name. Locality. Common Name. 
Gibba-......... South America, Africa, 
West Indies --++---+-- Gibbous Scallop 
Turgida-----. -++ East & WestIndies ----- Turgid---- do => 
Pyxidata aisielemaloisre) IVa abyaueaverersieielsleisieieres« - Box-like--- do -- 
Flavicans---+-+ +> Southern Ocean--- +++» Yellow -+-+ do-- 
Faminy 2.—Valves smooth. 
Tigrina boon o- Doe TIDYaripine GoouDmocoououOD Tyger Spoo Gly) ac 
Witt GooOoOC ecee Denmark --.---ceeccece Fucus::::- do -- 
Exotica:+ +++. Red Sea) << sciste ce cccic e+. Exotic do 
Vitrea -++ece ween Norway oeeecee oe cvcee Glassy -:-- do -- 
Obsoleta -:---- « Britains«!\«.cecee.eess- Obsolete -- do -- 
Leyis.-++>+<.. SDD IETOUaisielheletele is stejelelainlels « Smooth --- do-- 
Proteus «+++... -» Mediterranean--------+ + Variable -- do -- 
Diviston Ill.—Oblong, linear. 
FamiLy 1.—With a transverse lobe on each side of the hinge. 
Malleus-----+-+- Pulo Condore, South Seas, 
Ceylon --+-++++ee++ » Hammer Oyster 
FamiLy 2.—With a slight beak on one side the hinge. 
Figurata-------- Nicobar Isles ---+-++ --++ Figured--- do -- 
Famity 3.—Rounded at the hinge. 
Regula: -- Heraeore © |) FRed Sears acrsid 4 ateienyapce « Tongue shap’d do 
Famity 4.—Valves diverging at the hinge, and the inside vaulted. 
Fornicata:--+-+-+ Red Seacececeseeecee > Vaulted --» do-- 
