BIVALVES. — VENUS. 



51 



Almost all parts of the world supply specimens of this 

 genus. The American, African, Eastern, and Western 

 Oceans abound with them. The Mediterranean, Caspian, 

 and Southern Seas likewise produce various species; as al- 

 so do the European and more northern oceans. 



VENUS— re««5. 



Division I. — With the anterior depression spinous. 

 Dione — Prickly mouthed. Marica — American. 



Division II. — Subcordate. 



Paphia — Paphian. 

 *Fasciata — Banded. 

 Succincta — Grooved. 

 *ClngenAdL^'Girdled. 

 Dysera — Ribbed. 

 Tiara — Turban. 

 Plicata — Plaited. 

 *E xcavata — Excavated. 

 *Spinifera — Spiny. 

 *Verrucosa — Warty. 

 Rigida — Rigid. 

 *Casina — Broad-ribbed. 

 Cancellata — Channeled. 

 Subcordata — Subcordate. 

 *Minima — Red streaked. 

 * S ulcata — Furrowed. 

 *Montagui — Montague's 

 *Scotica — Scottish. 

 *Danmonia — Devonshire. 

 Reflexa — Reflected, 

 *Gallina — Hen. 

 *Circinata — Compass. 

 Caliste — Dirty white. 

 Compressa — Compressed. 

 V.xdWiid.dL— Whitish. 



Petulca — Clouded. 

 *Granulata — Grained. 

 ♦Ovata — Oval. 

 Paupercula — Despised. 

 Flexuosa — Flexuous. 

 Mactroides — Mactra. 

 Tn^ld.— Triple. 

 ♦Triangularis — Triangular 

 Malabarica — Malabar. 

 Flammea — Broivn-band. 

 Erycina — Polished. 

 Costata — Ribbed. 

 Pacifica — South-sea. 

 *Mercenaria — Money. 

 *Islandica — Icelandic. 

 Coaxans — Ceylon. 

 Lusoria — Sportive. 

 *Chione — Smooth brown. 

 Maculata — Spotted. 

 Casta — Chaste. 

 Meretrix — Lipped. 

 Paradoxa — Doubtful. 

 Laeta — Globose. 

 Pinguis — Sleek. 

 Triradiata — Three-rayed. 

 ^9 



