266 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL. 37. 
TIVELA HIANS Philippi. 
1851. Donax hians Pusmirri, Zeitschr. f. Mal., vol. 8, p. 74.— 
Roemer, Mon. Venus, p. 9, pl. 3, fig. 3, 1869. Magdalena 
Bay, Lower California, south to Valparaiso, Chile. 
TIVELA PLANULATA Broderip and Sowerby. 
1829. Cytherea planulata BropERie and SowErsy, Zool. Journ., 
vol. 5, p. 48.—SowxErsy, Thes. Con., Cytherea, pl. 127, fig. 13, 
1851. Gulf of California south to Coquimbo, Chile. 
Genus MACROCALLISTA Meek. 
MACROCALLISTA AURANTIACA Sowerby. 
1831. Cytherea aurantiaca SOWERBY, Gen. Sh., vol. 33, fig. 6; 
Thes. Con., Cytherea, pl. 182, fig. 97 bzs, 1853. Gulf of Cali- 
fornia to Guayaquil. 
MACROCALLISTA PANNOSA Sowerby. 
1835. Cytherea pannosa SowERBY, Proc. Zool. Soc., p 47; Thes. 
Con., Cytherea, pl. 138, figs. 140-142; pl. 163, figs. 202-203, 
1851. Gulf of California south to Valparaiso, Chile. 
MACROCALLISTA SQUALIDA Sowerby. 
1835. Cytherea squalida SOWERBY, Proc. Zool. Soc., p. 23; Thes. 
Con., Cytherea, p. 629, pl. 131, figs. 87-89, 1851. Cedros 
Island, Lower California, south to Peru. . 
Genus PITARIA Roemer. 
PITARIA INCONSPICUA Sowerby. 
1835. Cytherea ineconspicua SowpRBY, Proc. Zool. Soe., p.-47; 
Thes. Con., Cytherea, pl. 133, figs. 188-134, 1852. Paita, 
Peru, and south to Taleahuano, Chile. 
PITARIA POLLICARIS Carpenter. 
1864. Callista pollicaris CARPENTER, Ann. Mag. Nat. Hist., 
vol. 13, p. 475.—RuxEve, Con. Icon., Dione (prora), fig. 45. 
Gulf of California to Callao, Peru. 
PITARIA TOMEANA Dall. 
1902. Proc. U.S. Nat. Mus., vol: 26, p: 402), pl. Wise: 
Gulf of Panama to Tomé, Chile, and the Galapagos Islands. 
PITARIA (LAMELLICONCHA) CIRCINATA Born. 
1780. Venus circinata Born, Test. Mus. Vind., p. 61, pl. 4, fig. 
8.—SowErBy, Thes. Con., Cytherea, pl. 182, figs. 104-106, 
1853. Gulf of California to Paita, Peru. 
PITARIA (LAMELLICONCHA) CONCINNA Sowerby. 
1835. Oytherea concinna SowErRBy, Proc. Zool. Soe., p. 235 
Thes. Con., Cytherea, pl. 132, figs. 99-100, 1851. Magdalena 
Bay, Lower California, to Paita, Peru. 
PITARIA (LAMELLICONCHA) CUMINGI Orbigny. 
1846. Venus cumingi Orsieny, Voy. Am. Mér., p. 563.— 
Cytherea modesta SowERBY, Thes. Con., Cytherea, pl. 136, 
fig. 184, 1851. Jipijapa, Ecuador. 
