no. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 221 
THAIS CHOCOLATA Duclos. 
1832. Purpura chocolata Ductos, Ann. Sci. Nat., vol. 26, p. 
108, pl. 2, fig. 7.—Orsieny, Voy. Am. Mér., vol. 5, p. 436, 
pl. 61, figs. 1-3, 1841. Paita, Peru, south to Valparaiso, 
Chile. * 
THAIS COLUMELLARIS Lamarck. 
1822. Purpura columellaris Lamarcn, An. s. Vert., vol. 7, p. 
936.—REEVE, Con. Icon., Purpura, pl. 2, fig. 9, 1846. Gulf 
of Panama to Peru and the Galapagos Islands. 
THAIS COSTATA Blainville. 
1832. Purpura costata BLAINVILLE, Nouv. Ann. du Mus., vol. I, 
p. 231, pl. 11, fig. 8. Mazatlan, Mexico, to Paita, Peru. 
THAIS CRASSA Blainville. 
1832. Purpura crassa BLAINVILLE, Nouv. Ann. du Mus., vol. 1, 
p. 241, pl. 12, fig. 4 (March).— P. melones Ductos, Ann. Sci. 
Nat., vol. 26, p. 105, pl. 1, fig. 2 (May), 1832. Gulf of Pan- 
ama to Callao, Peru, and the Galapagos Islands. 
THAIS DELESSERTIANA Orbigny. 
1841. Voy. Am. Mér., p. 439, pl. 77, fig. 7. Cedros Island, 
Lower California, south to the Chincha Islands, Peru. 
THAIS KIOSQUIFORMIS Duclos. 
1832. Purpura kiosquiformis.Ductos, Ann. Sci. Nat., vol. 26, 
pl. 1, fig, 5.—Kiensr, Icon., Purpura, p. 59, pl. 15, fig. 40. 
Magdalena Bay, Lower California, southward to Tumbes, 
Ber: 
THAIS PATULA Linneus. 
1758. Buccinum patulum Linnmus, Syst. Nat., 10th ed., p. 739; 
12th ed., -p. 1202, 1767.—Rerxrve, Con. Icon., Purpura, fig. 3. 
Gulf of California to Panama and the Galapagos. Peru 
(Tschudi). West Indies. 
THAIS PERUENSIS Dall, new name. 
1909. Purpura peruviana Eypoux and SouLrnyEt, Voy. Bonite, 
Zool., vol. 2, p. 606, pl. 40, figs. 1-3, 1852. Not of BLarn- 
VILLE, 1832. Paita and Pacasmayo, Peru. 
THAIS PLANOSPIRA Lamarck. 
1822. Purpura planospira Lamarck, An. s. Vert., vol. 7, p. 
240.—ReEVE, Con. Icon., Purpura, pl. 3, fig. 14, 1846. 
Lower California, and southward to Peru, and the Galapagos 
Islands. 
THAIS TRIANGULARIS Blainville. 
1832. Purpura triangularis BuatnviiLE, Nouy. Ann. du Mus., 
vol. 1, p. 223, pl. 11, fig. 4. Mazatlan, Mexico, and south 
to Paita, Peru, and the Galapagos Islands. 
