NO. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 253 



ARC A (SCAPHARCA) BREVIFRONS Sowerby. 



1833. Proc. Zool. Soc, p. 22. — Reeve, Con. Icon., Area, pi. 1, 

 fig. 6, 1844. Gulf of California to Tumbes, Peru. 



ARCA fSCAPHARCA) CEPOIDES Reeve. 



1844. Con. Icon., Area, pi. 10, fig. 66. San Miguel, Ecuador. 



ARCA (SCAPHARCA) EMARGINATA Sowerby. 



1833. Proc. ZooL Soc, p. 20. — Reeve, Con. Icon., A^'ca, pi. 4, 

 fig. 26, 1844. Gulf of California, and south to Atacames, 

 Ecuador, and Guaj^aquil. 



ARCA (SCAPHARCA) FORMOSA Sowerby. 



1833. Proc. Zool. Soc, p. 20.— Hanley, Rec Biv. Sh., p. 160, 

 pi. 19, fig. 9, 1843. Lower California to Paita, Peru. 



ARCA (SCAPHARCA) LABIATA Sowerby. 



1833. Proc. Zool. Soc, p., 21. — Reeve, Con. Icon., Area, pi. 1, 

 fig. 7, 1844. San Diego, California, to Tumbes, Peru. 



ARCA (SCAPHARCA) LABIOSA Sowerby. 



1833. Proc. Zool. Soc, p. 21. — Reeve, Con. Icon., Area, pi. 10, 

 fig. 67, 1844. Tumbes, Peru. 



ARCA (SCAPHARCA) NUX Sowerby. 



1833. Proc Zool. Soc, p. 19. — Reeve, Con. Icon., Area, pi. 1, 

 fig. 1, 1844. Panama to Ecuador. Jipijapa, 12 fathoms. 



ARCA (SCAPHARCA) GEES A Sowerby. 



1833. Proc Zool. Soc, p. 21. — Reeve, Con. Icon., Area, pi. 1, 

 fig. 3, 1844. Ecuador coast. 



ARCA (SCAPHARCA) TUBERCULOSA Sowerby. 



1833. Proc. Zool. Soc, p. 19. — Philippi, Abb., vol. 1, p. 44, pi. 

 1, fig. 2, 1843. Ballenas lagoon. Lower California, to Tumbes, 

 Peru. 



ARCA (CUNEARCA) .EQUATORIALIS Orbigny. 



1846. Voy. Am. Mer., p. 636. — Area ovata Reeve (not Gmelin, 

 1791), Con. Icon., Area, pi. 8, fig. 49, 1844. Santa Elena, 

 Ecuador. 



ARCA (CUNEARCA) CARDIIFORMIS Sowerby. 



1833. Proc Zool. Soc, p. 22. — Reeve, Con. Icon., Area, pi. 3, 

 fig. 17, 1844. Gulf of California to Paita, Peru. 



ARCA (ANADARA) GRANDIS Broderip and Sowerby. 



1829. Zool. Journ., vol. 4, p. 365. — Reeve, Con. Icon., Ai'ea, 

 pi. 1, fig. 4, 1844. Magdalena Bay, Lower California, to 

 Tumbes, Peru. 



ARCA (NOETIA) REVERSA Sowerby. 



1833. Proc Zool. Soc, p. 20. — Reeve, Con. Icon., Area, pi. 1, 

 fig 5, 1844. Gulf of California to Tumbes, Peru. 



Genus GLYCYMERIS Da Costa. 



GLYCYMERIS CHEMNITZU Dall, new name, 



1909. Pectuneulus minor Orbigny, Voy. Am. Mer., 1846, p. 628, 

 not of I. Lea, 1833. Gulf of California, south to Monte 

 Cristi. Ecuador. ** 



