108 MAZATLAN BIVALVES 
154, LasEa Prusra, Mont. 
Cardium rubrum, Mont. Test. Brit. p.83, pl. 27, f. 4. (non Rve.) 
Tellina rubra, Turt. Conch. Dict. p. 168. 
Kellia rubra, Turt. Dith. Brit. pp. 57, 258, pl. 11, f. 7, 8.— 
Forbes & Hant. Br. Moll. vol. 11. p. 94, pl. 36, f. 5-7 : (animal) 
pl. O, f.3.— Clark Moll. Test. Mar. Br. p.92.—Searles Wood 
Crag Moll. pt. ii. p. 125, pl. 11, f. 10. 
Poronia rubra, Réel. Rev. Cuv. Zool. 1843, p. 175. 
Lasea rubra, Leach. ms.— Brown Ill. Conch. 1827, t. 20, f. 17-19. 
Lesza rubra, Brown, op. cit. ed. 2, p. 93, pl. 36, f. 17, 18. 
Petricola rubra, Gray Ann. Phil. 1825. 
Lasea rubra, B. M. Cat. Br. Moll. vii. p. 82. — Phil. Hand. 
Conch. p. 345. 
Bornia semilunum, Phil. Moll. Sic. vol. i. o 14, ply bf 16, & 
vol. ii, p. 11.— Krauss Sudafr. Moll. p. 2 
Erycina violacea, Scacchi, Cat. 6. 
Cycladina Adansonu, Cantr. Bull. Acad. Brux. 
Cyclas australis, Lam. An. s. Vert. ed. Desh. vi. 270, (teste 
Gray.) 
? Amphidesma nucleola, Lam. op. cit. vi. 270. 
Autonoe rubra, Leach, Br. Moll. 288, pl. 12, f. 5, 7 
[For other references, v. B. M. Cat. loc. cit]. 
Whether the little Mazatlan shells (of which only one pair 
and a few valves were found,) are distinct from the typical 
European species, must be left for future determination, when 
its distribution shall have been better ascertained. The teeth 
are smaller than in most British specimens, but it by no means 
differs from them so much as do the Mediterranean examples. 
The late, deeply regretted Prof. EK. Forbes considered that 
they might be identical. He gives the species from the North 
and South Atlantic. Dunker quotes a similar shell from the 
Guinea coast, and Krauss the same from South Africa. I have 
it from Java, and Singapore (among Chame). Dr. Gould gives 
it from Massachusetts, South of Cape Cod. Mr. Cuming found 
a similar shellin abundance at Valparaiso, on high exposed 
rocks, seldom washed by the sea, along with a little Littorina, 
like L. neritea. An extremely similar species is K. miliaris, 
Desh. from Eagle Bay, Magellan. A species closely resem- 
bling it in shape but white, and with concentric ridges (which 
however, being irregular, may be a local variety) is from the 
Bay of Mexillones, Desert of Atacamas, Bolivia, adhering to 
Balani in exposed situations, (Cuming). Lamarck’s Cyclas 
australis is from the Isle of Timor, with a variety from K. 
