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Show 1G MR. H. ADAMS ON NEW SHELLS. [Jail. 9, first discovered by myself, several years since, among large boulders of blue basalt, about halfway up the Montagne-au-Riz, on the left-hand side of the road to Moka; and subsequently I found a fevv perfect specimens in the same locality, but all more or less bleached by exposure. During the remainder of my residence at Mauritius no other specimen was met with; but since my return to England, the one figured, which is in better condition than those I collected, was obtained on the same spot by E. Dupont, jun., Esq., and sent to me."-D. Barclay. GIBBUS (GIBBULINA) CLAVULUS, H. Ad. (Pl. IV. fig. 13.) G. testa profunde rimata, ovata, tenuiuscula, oblique jiexuoso costellata; spira attenuata, apice acuminato, sutura distincta; anfr. 7-8, convexiusculis, ultimo ad peripheriam angulato, basi subplanato, antice vix ascendente; apertura subverticali, ovali, dente parietali valido prope angulum coarctata ; perist. continuo, soluto, subincrassato, undique late expanso. Long. 18, diam. 8 mill. Hab. Mauritius (Coll. Barclay). This species, I am informed, has been long known at Mauritius under the name of clavulus, which name I therefore with much pleasure retain for it. PALAINA COXI, H. Ad. (Pl. IV. fig. 14.) P. testa sinistrorsa, subperforata, ovata, costulis compressis, sculpta, albida ; spira convexo-conica, apice obtu-siusculo, corneo; anfr. 6, convexis, ultimo angustiore, paulum ascendente; apertura subverticali, circulari; perist. duplici, externo valde expanso, breviter interrupto. Long. 3, diam. 1 mill. Hab. Norfolk Island (Coll. J. C. Cox). DIPLOMMATINA MINUTA, H. Ad. (Pl. IV. fig. 15.) D. testa dextrorsa, rimata, fusiformi-ovata, costulis debilibus obliquis sculpta, pallide rufo-fusca ; spira elongata, obtusiusculo ; anfr. 7, convexis, antepenultimo tumidiore, antice paulum ascendente; apertura subverticali, truncato-rotundata, plica columellari conspicua ; perist. duplici, interno porrecto, expansiusculo, externo subrefiexo, marginibus callo expanso junctis, columellari sinuato, basi angulato. Long. 2, diam. If mill. Hab. 1 (Coll. H.Adams). Fam. ANATINIDAE. Genus PELOPIA, H. Ad. Testa incequivalvis, subovata, ventricosa, clausa, superfieie scabra, umbonibus integris. Cardo sub umbonibus apo-physibus duabus, horizontalibus, antice curvatis munitus • carti- |