NO. 1704. A COLLECTION OF SHELLS FROM PERU^DALL. 275 



Family MESODESMATID^E. 



Genus MESODESMA Deshayes. 

 MESODESMA DONACIUM Lamarck. 



1818. JIactra donacla Lamarck, An. 8. Vert., vol, 5, p. 479. — 

 Chenu, Man., vol. 2, p. 79, fig. 341, 1862. Sechura Bay, 

 Peru, south to Valparaiso, Chile. 



Superfamily MYACEA. 

 Family CORBULID.E. 

 Genus CORBULA Bruguiere. 

 CORBULA BICARINATA Sowerby. 



1833. Proc. Zool. 8oc., p. 35. — Reeve, Conch. Icon., Corhula^ 

 pi. 3, fig. 23, 1844. Panama to Guayaquil, 



CORBULA BIRADIATA Sowerby. 



1833, Proc, Zool. Soc, p, 35. — Reeve, Con. Icon., Corbula, 

 pi. 1, fig, 3, 1844, Gulf of Panama to Guayaquil. 



CORBULA NASUTA Sowerby. 



1833, Proc. Zool, Soc, p. 35, — Reeve, Con, Icon., Corhula^ 

 pi. 1, fig. 1, 1844 (not of Conrad). Gulf of Panama to Jipi- 

 japa, Ecuador. 



CORBULA OVULATA Sowerby. 



1833. Proc. Zool. Soc, p. 35, — Reeve, Con. Icon., Corhula^ 

 pi. 1, fig. 7, 1844. Gulf of Panama to Guayaquil. 



Family SAXICAVID.F, 



Genus SAXICAVA F. de Bellevue. 

 SAXICAVA PURPURASCENS Sowerby. 



1834. Proc Zool. Soc, p. 88; Thes. Con., Saxicava^ p. 133, 

 pi. 471, fig, 7, 1884, Bay of Guayaquil. 



SAXICAVA SOUDA Sowerby. 



1834. Proc Zool. Soc, p. 88; Thes. Con,, Saxicava^ p, 133, 

 pi, 471, fig, 12, 1884. Bay of Guayaquil and south to Punta 

 Arenas, Magellan straits. 



Family GASTROCH.FNID.F. 



Genus GASTROCH^^NA Spengler. 

 GASTROCH^NA DENTICULATA Deshayes. 



1854. Proc Zool. Soc, p. 327; Thes, Con,, Gastrochaena, p. 129, 

 pi, 470, fig. 7, 1884, Ecuador coast. 



GASTROCH^NA OVATA Sowerby. 



1834. Proc Zool, Soc, p. 21; Thes. Con,, Gastrochpena^ p. 128, 

 pi, 470, fig. 9, 1884. Panama to La Plata Island, Ecuador, 

 Also Atlantic 



