252 PROCEEDINOS OF THE NATIONAL MUSEUM. vol.37. 



ARCA ALTERNATA Sowerby. 



1833. Byssoarca alternata Sowerby, Proc. Zool. Soc, p. IT. — 

 Reeve, Con. Icon., Area, pi. 13, fig. 88, 1844. Panama to 

 Ecuador. 



ARCA GRADATA Broderip and Sowerby. 



1829. Zool. Journ., vol. 4, p. 365. — Reeve, Con. Icon., Arm, 

 pi. 14, fig. 92, 1844. Mazatlan, Mexico, to Iquique, Chile, 

 and the Galapagos Islands. 



ARCA PUSILLA Sowerby. 



1833. Byssoarca jpusilla Sowerby, Proc. Zool. Soc, p. 18. — 

 Reeve, Con. Icon., Area, pi. 16, fig. 112, 1844. Coast of 

 Ecuador, and south to S. lat. 23° 37'. 



ARCA SOLIDA Sowerby. 



1833. Proc. Zool. Soc, p. 18. — Reeve, Con. Icon., J.r<?(7, pi. 16, 

 fig. 106, 1844. Gulf of California, to Paita, Peru, and the 

 Galapagos Islands. 



ARCA (BARBATIA) BIANGULATA Sowerby. 



1833. Area hiangulata Sowerby, Proc. Zool. Soc, p. 21. Guaya- 

 quil. 



ARCA (BARBATIA) DECUSSATA Sowerby. 



1833. Byssoarca decussata Sowerby, Proc. Zool. Soc, p. 18. — 

 Reeve, Con. Icon., Area, pi. 12, fig. 81, 1844. Galapagos 

 Islands. 



ARCA (BARBATIA) LITHODOMUS Sowerby. 



1833. Byssoarca Uthodomus Sowerby, Proc. Zool. Soc, p. 16. — 

 Reeve, Con. Icon., Area, pi. 12, fig. 76, 1844. {Barhatia 

 grown in a Lithodoimis burrow?) Monte Cristi, Ecuador. 



ARCA (BARBATIA) LURID A Sowerby. 



1833. Byssoarca lurida Sowerby, Proc. Zool. Soc, p. 19. — 

 Reeve, Con. Icon., Area, pi. 14, fig. 95, 1844. Santa Elena, 

 Guayaquil. 



ARCA (BARBATIA) REEVIANA Orbigny. 



1846. Area reeviana Orbigny, Voy. Am. Mer., p. 635. — Area 

 helhlingi Reeve, Con. Icon., Area, pi. 14, fig. 90, 1844; not 

 of Bruguiere, 1789. From Manta, Ecuador, south to Paita, 

 Peru. 



ARCA (BARBATIA) VELATA Sowerby. 



1833. Byssoarca vclata Sowerby, Proc. Zool. Soc, p. 18. — 

 Reeve, Con. Icon., Area, fig. 79, 1844. Indo-Pacific Peru 

 (Tschudi). 



ARCA (CUCULLARIA) PLATEI Stempell. 



1899. Ai'ca {Barhat id) jjlatei Stkmfkl,1j, Fauna Chilensis, vol. 2, 

 p. 220, pi. 12, tigs. 10-12. Juan Fernandez Island. 



ARCA (SCAPHARCA) AVICULOIDES Reeve. 



1844. Area avicidoides Reeve, Con. Icon., Area, pi. 10, fig. 63 

 (and pi. 6, fig. 35 as A. auricxdata Sowerby, not Lamarck). 

 Panama to (juayaquil. 



