250 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 37. 
Class PELECYPODA. 
“Order PRIONODESMACEA. 
(FOLIOBRANCHIAT A.) 
Superfamily NUCULACEA. 
Family NUCULID 2. 
Genus NUCULA Lamarck. 
NUCULA COLOMBIANA Dall. 
1908. Albatross Rep., p. 871. Panama to Patagonia. 
NUCULA DECLIVIS Hinds. 
1843. Proc. Zool. Soc., p. 97; Zodl. Voy. Sulph., p. 638, pl. 18, 
fig. 8, 1844. Panama to Magellan Straits. 
NUCULA EXIGUA Sowerby. 
1832. Proc. Zool. Soc., p. 198; Con. Ill., Wucula, figs, 24, 24*, 
1833. Acapulco, Mexico, south to Ecuador and to the 
Magellanic region. 
NUCULA GRAYI Orbigny. 
1841. Voy. Am. Mér., p..625.—Sowersy, Con. Ill., Wueula, 
fig. 21. Valparaiso, Chile. 
NUCULA PAYTENSIS A. Adams. 
1856. Proc. Zool. Soc., p. 51.—Hantey, Thes. Con., Vucula, p. 
50, pl. 5, figs, 160- 161, 1860. Eniin, Peru. 
NUCULA PISUM Sowerby. 
1832. Proc. Zool. Soc., p. 198; Con. Ill., Wucula, fig. 23, 1841.— 
Orpieny, Voy. Am. Mér., p, 624 (as WV. semdornata), pl. 84, 
figs. 27-29, 1846. Valparaiso to San Blas, Chile. 
Family LEDIDZ. 
- Genus LEDA Schumacher. 
LEDA ACUTA Conrad. 
1831. MWucula acuta Conrapd, Am. Mar. Con., p. 32, pl. 6, fig. 3 
(not of SowreRBy, 1839).—Sowrrsy, Con. IIl., Vucula, fig. 
15 (as WV. cuneata). California, the Gulf of Panama, and south 
to Valparaiso, Chile. Also Atlantic. 
LEDA CALLIMENE Dall. 
1908. Leda (Supiteria) callimene Datu, Albatross Rep., p. 342, 
pl. 17, figs. 8, 4. Gulf of Panama to Tomé, Chile. 
LEDA EBURNEA Sowerby. 
1832. Nucula eburnea SowERBY, Proc. Zool. Soc., p. 198; Con. 
Ill., Vucula, fig. 10, 1833. Gulf of Panama to the Bay of 
Caraques, Ecuador. 
