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BIVALVES. OSTREA, 



B, — Rough, generally plaited on the outside. — Oyster. 



Malleus — Hammer. 

 Vulsella — Tongue-shaped. 

 Anatina — Duck. 

 Diluviana — An tediluvian. 

 Folium — Leaf. 

 Orbicularis — Orbicular. 

 *E dulis — Common. 

 Semiaurita — Half-eared. 

 * S triata — Stria ted. 

 Fornicata — Vaulted. 

 Sinensis — Chinese. 

 Spondyloidea — Spondyloid. 

 Forskalii — ForsJcael 's. 



Plicatula — Plaited. 

 Rostrata — Beaked. 

 Virgi nica — Virginian . 

 Cornucopiae — Horn of plenty. 

 Parasitica — Parasitical. 

 Exalbida — Whitish. 

 Crista ta — Crested. 

 Senegalens's — Senegal. 

 Stellata — Stellated. 

 Ovalis — Oval. 

 Papyracea — Paper. 

 A nnulata — Annular. 

 Retusa — Retuse. 



C. — Hinge with a perpendicular grooved line. 



Perna — Oblong. 

 Isognomon — Rudder. 

 Ephippium — Saddle. 

 Picta — Painted, 



Legumen — Pod-shaped. 

 Alata — Winged. 

 Mytiloides — Muscle-like. 

 Torta — Twisted. 



Pes-lutrse — Otter'' s-foot. 



ANOMIA. — Anomia or Antique Lamp. 



Animal — an emarginated, ciliated, strap-shaped body: 

 with bristles or fringe affixed to the upper valve; arms 

 two, linear, longer than the body ; connivent projecting, 

 alternate on the valve, and ciliate on each side, the fringe 

 affixed to each valve : shell bivalve, ineqnivalve, one of 



