ee 
No. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 953 
ARCA (SCAPHARCA) BREVIFRONS Sowerby. 
1833. Proc. Zool. Soc., p. 22.—REEVeE, Con. Icon.; Arca, pl. 1, 
fio. 6, 1844. Gulf of California to Tumbes, Peru. 
ARCA (SCAPHARCA) CEPOIDES Reeve. 
1844. Con. Icon., Arca, pl. 10, fig. 66. San Miguel, Ecuador. 
ARCA (SCAPHARCA) EMARGINATA Sowerby. 
1833. Proc. Zool. Soc., p. 20.—REEVE, Con. Icon., Arca, pl. 4, 
fig. 26, 1844. Gulf of California, and south to Atacames, 
Keuador, and Guayaquil. 
ARCA (SCAPHARCA) FORMOSA Sowerby. 
1833. Proc. Zool. Soc., p. 20.—Hantery, Rec. Biv. Sh., p. 160, 
pl. 19, fig. 9, 1848. Lower California to Paita, Peru. 
ARCA (SCAPHARCA) LABIATA Sowerby. 
1833. Proc. Zool. Soc., p., 21.—REEVE, Con. Icon. 5 AVAGO, JOlle al 
fig. 7, 1844. San Diego, California, to Temlsea, Peru. 
ARCA (SCAPHARCA) LABIOSA Sowerby. 
1833. Proc. Zool. Soc., p. 21.—Rerxrve, Con. Icon., Arca, pl. 10, 
fig. 67, 1844. Tumbes, Peru. 
ARCA (SCAPHARCA) NUX Sowerby. 
1833. Proc. Zool. Soc., p. 19.—REEvE, Con. Icon., Arca, pl. 1, 
fig. 1, 1844. Panama to Ecuador. Jipijapa, 12 fathoms. 
ARCA (SCAPHARCA) OBESA Sowerby. 
1833. Proc. Zool. Soc., p. 21.—RerEve, Con. Icon., Arca, pl. 1, 
fig. 8, 1844. Ecuador coast. 
ARCA (SCAPHARCA) TUBERCULOSA Sowerby. 
1833. Proc. Zool. Soc., p. 19.—Puiipr1, Abb., vol. 1, p. 44, pl. 
1, fig. 2, 1848. Ballenas lagoon, Lower California, to Tumbes, 
Peru. 
ARCA (CUNEARCA) AQUATORIALIS Orbigny. 
1846. Voy. Am. Mér., p. 636.—Arca ovata REEVE (not GMELIN, 
1791), Con. Icon., Arca, pl. 8, fig. 49, 1844. Santa Elena, 
Keuador. 
ARCA (CUNEARCA) CARDIIFORMIS Sowerby. 7107 /Oxs 
1833. Proc. Zool. Soc., p. 22. Serer Gon. cue ATCd, pi 3; 
fig. 17, 1844. Gulf of California to Paita, stem 
ARCA (ANADARA) GRANDIS Broderip and Sowerby. 
1829. Zool. Journ., vol. 4, p. 365.—ReEEvE, Con. Icon., Arca, 
pl. 1, fig. 4, 1844. Magdalena Bay, Lower California, to 
Tumbes, Peru. 
ARCA (NOETIA) REVERSA Sowerby. 
1833. Proc. Zool. Soc., p. 20.—R«ExEVE, Con. Icon., Arca, pl. 1, 
fig 5, 1844. Gulf of California to Tumbes, Peru. 
Genus GLYCYMERIS Da Costa. 
GLYCYMERIS CHEMNITZII Dall, new name. 
1909. Pectunculus minor Orpieny, Voy. Am. Mér., 1846, p. 628, 
not of I. Lea, 1833. Gulf of California. south to Monte 
Cristi, Ecuador. 
