NO. 1704. A COLLECTION OF SHELLS FROM PERU— BALL. 255 



Family PTERIID.i:. 



Genus PTERIA Scopoli. 

 PTERIA PERUVIANA Reeve, 



1857. Avicula peruviana Reeve, Con. Icon., Aoicula, pi. 14, 

 fig. 53. Gulf of California to Paita, Peru. 



Genus MARGARITIPHORA Megerle. 

 MARGARITIPHORA CUMINGl Reeve. 



1857. Avicula camlngl Reeve, Con. Icon., pi. 1, fig. 6. Paita, 

 Peru, and the Galapago.s Lslancls. 



Superfamily OSTRACEA. 

 Family OSTREID.E. 



Genus OSTREA Linnaeus. 

 OSTREA ^QUATORIALIS Orbigny. 



1846. Vo3\ Am. Mer., p. 672. Bay of Guayaquil (on tree.s). 

 Paita, Peru. 



OSTREA CALLICHROA Hanley. 



1845. Proc. Zool. 8oc. , p. 107. — Sowerby, Con. Icon., Ostrea^ 

 pi. 4, fig. 6, 1870. Chiloe Island, Chile. 



OSTREA CHILENSIS Philippi. 



1845. Con. Cab., ed. 2, Ostrea, p. 74, pi. 13, figs. 7, 8. Coast of 

 Ecuador, south to Chiloe Island, Chile. 



OSTREA COLUMBIENSIS Hanley. 



1845. Proc. Zool. Soc, p. 107. — Sowerby, Con. Icon., Ostrea. 

 pi. 7, fig. lOa-b^ 1871. Gulf of California, south to Coquimbo, 

 Chile. 



OSTREA LONGIUSCULA Hupe. 



1854. Hist, de (Jhile, Zool., Mol., p. 282, pi. 5, fig. 3. Coquimbo, 

 Chile. 



OSTREA MEGODON Hanley. 



1845. Proc. Zool. Soc, p. 106. — Sowerby, Con. Icon., Ostrea, 

 pi. 12, fig. 24, 1871. Scammon Lagoon, Lower California, 

 to Sechura Bay, Peru. Fossil, Antilles. 



OSTREA VINOLENTA Hupe. 



1854. Hist, de Chile, Zool., Mol., p. 282, pi. 5, fig. 2. Coquimbo, 

 Chile. 



Superfamily PECTINACEA. 



Family PECTINID^. 

 Genus PECTEN Muller. 

 PECTEN DENTATUS Sowerby. 



1835. Proc. Zool. Soc, p. 109; Thes. Con., vol. 1, Pecten, p. 49, 

 pi. 15, figs. 105, 106, 1843. Santa Elena, Ecuador, to Paita, 

 Peru. 



