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Show 734 MR. E. A. SMITH ON WEST-AFRICAN SHELLS. [Dec. 5, 62. IANTHINA BALTEATA, Reeve, Conch. Icon. xi. sp. 11. Hab. North Atlantic ? 63. SCALA MIRANDA, sp. nov. (Plate LXXV. fig. 15.) Testapyramidalis, imperforata, grisea; anfract. 8, perconvexi, va-ricibus obliquis numerosissimis tenuissimis (in anfract. ultimo ornati; spiraliter minute sed distincte striati; apertura subcir-cularis. Long. 9 mill., diam. 4. Hab. Whydah. A very numerously and finely variced species, with very convex whorls. 64. SCALA BAIRDII, sp. nov. (Plate LXXV. fig. 14.) Testa elongata, subturrita, imperforata, albido-purpurascens ; anfract. 9, subconvexi, costis crassis curvatis (in anfract. ultimo 14) instructi, spiraliter minutissime costas inter et supra striati; apertura ovata. Long. 11 mill., diam. 3k. Hab. Whydah. This is very distinct from any species yet known. The ribs are produced on to the whorls above, giving the sutural line a neat wavy appearance. Named after m y kind friend Dr. Baird. 65. ACLIS CARINATA, sp. nov. (Plate LXXV. fig. 20.) Testa elongata, sordide alba; anfract. 9, perconvexi, transverse tenuiter sulcati; ad peripheriam subacute carinata; apertura ovata, basi effusa. Long. 10 mill., diam. 2|. Hab. Whydah. A very graceful shell, with neatly sulcated whorls. The keel at the periphery is very remarkable. 66. MONOPTYGMA (MYONIA) PUNCTURATA, sp. nov. (Plate LXXV. fig. 16.) Testa parva, elongato-ovata, subpellucida, brunneo - albida ; anfract. 4, convexi, spiraliter valide punctato-sulcati; in anfract. ult. 17; spira brevis, apice obtuso ; apertura subovata, | longitudinis paulo superans, basi subeffusa, marginibus callo tenui junctis columella oblicpia tortuosa. Long. 5 mill., diam. 2. Hab. Whydah. The sculpture agrees with that of M. amcena, A. Ad. Proc. Zool. Soc. 1851, p. 223, from the Philippines; but the convexity and number of the whorls, the shortness of the spire, and the obtuse apex are sufficient characters by which it may readily be distinguished. 67. OBELISCUS (SYRNOLA) GRACILLIMA, sp. nov. (Plate L X X V . fig. 17.) Testa imperforata, gracilis, elongata, polita, alba; anfract. 11, |