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Show 424 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16, species. It is fairly constant in colour and markings, but somewhat in form, some specimens being rather narrower and more produced posteriorly than others. As is usual, young shells are more compressed than adult specimens. 195. CIRCE SCRIPTA (Linn.). Hab. Red Sea, Indian Ocean, Moluccas, &c. 196. CIRCE (CRISTA) PECTINATA (Linn.). Hab. Same as preceding species. Aden (Caramagna). 197. CIRCE (LIOCONCHA) CALLIPYGA (Born). Hab. Red Sea ; Aden (Caramagna). All kinds of colouring exist among the specimens from Aden. 198. VENUS RETICULATA, Linn. Hab. Red Sea, Persian Gulf, Indian Ocean, Philippines, New Caledonia, Society and Fiji Islands. The Aden specimens are peculiar in having the hinge-teeth white instead of red as usual. In other respects they correspond exactly with the usual type of the species. 199. TAPES SULCARIUS, Lamarck. Hab. Moluccas, Indian Ocean. 200. TAPES DESHAYESII, Hanley. Hab. Philippine Islands; Mauritius; Red Sea (Issel and Brit. Mus.). The single specimen from Aden is marked very similarly to that figured by Reeve (Con. Icon. f. 4 a). 201. TAPES MALABARICUS (Chemnitz). Hab. Malabar, Ceylon, Mergui, Moluccas, Philippines, China. The specimens from Aden agree precisely with Reeve's T. lenti-ginosa (Con. Icon. f. 25), which I consider a form of this species. They are large strong shells with coarse concentric ridges and a well-sinuated posterior margin. The finest specimen is 7^ millim. long, 57 high, and 29 in diameter. Romer1 has considered Reeve's T. turgidula (Con. Icon. f. 32) a " var. monstrosa " of T. malabaricus; but I may point out that the shell figured by Reeve is a specimen of T. injiata of Deshayes, which is figured in the Proc. Zool. Soc. 1853, pi. 19. ff. 3 a-3 b. T. injiata, as determined by Romer, appears to be a large coarsely ribbed T. malabaricus. T. inflatus proper is perfectly smooth at the umbones and has less sinuathm in the posterior ventral margin ; in other respects it agrees with T. malabaricus. 202. TAPES OBSCURATUS, Deshayes, var. Hab. Philippines. Three specimens from Aden may belong to this species. They 1 Monogr. Tapes, p. 34. |