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Show 1885.] FROM THE SOLOMON ISLANDS. 603 47. M E L A N I A GUPPYI. (Plate XXXVII. figs. 6, 6 a.) Shell slenderly acuminate, covered with an olive-brown epidermis. Whorls about 14, divided by a very oblique deepish suture, concave above the middle and somewhat convex below it, and then contracted ; ornamented with a few spiral series of nodules (about five on the upper whorls) and rather indistinct, very oblique and flexuous, longitudinal ridges, upon which the nodules rest, also exhibiting very sloping and flexuous lines of growth ; the most conspicuous rows of granules are near the middle of the whorls. Aperture pyriform. Outer lip thin, remarkably sinuated above towards the suture and arcuately prominent below. Columellar margin oblique, straightish, covered with a callus, curving into the broad basal sinus. Length 31 millim., diameter 7; aperture 9 long, 4 wide. Hab. " From the stomach and intestines of a fish living in the freshwater lake of Wailava in the island of Santa Anna" (Guppy). This is a very remarkable and distinct species, with a very drawn-out spire, peculiar granuled sculpture, and a deeply sinuated labrum. I have much pleasure in naming it after Mr. Guppy. 48. CERITHIDEA CORNEA, A. Adams (var.). Hab. From Mangrove swamps, Choiseul Bay (Guppy) ; Andai, New Guinea (Tapparone Canefri) ; Borneo (Adams). The specimens from the Solomon Islands vary slightly from the Bornean shells in Cuming's collection. The ribs are somewhat farther apart, the body-whorl is rather more distinctly carinate at the periphery, the aperture a trifle larger, the lip being more expanded and more produced to the left over the channel at the base of the columella. The whorls, too, are somewhat higher, for in specimens of the same length I find about a whorl more in the specimens from the Solomon Islands than in the original types. 49. NERITA MARMORATA, Hombron and Jacquinot. Hab. Found "living just above high-water mark on the surface of the' coral-limestone coast, San Christoval" (Guppy); Solomon Islands (Hombron and Jacquinot). This species was described by Reeve (Conchol. Icomca, vol. ix. sp 47) under the name N. oleagina, a year after the publication of the Zooloo-y of the 'Voyage au Pole Sud' by Rousseau. Reeve's figure gives abetter idea of the mottled colouring than that in Hombron and Jacquinot's Atlas, pi. 16. f. 15-17. Their figure of the operculum does not appear to be quite correct in outline judging from those obtained by Mr. Guppy, none of which have the emar-eination on the columellar side m front. The apical whorls in all examples are of a lemon-yellow colour, and the columellar margin between the teeth is generally suffused with the same tint. Nerita marmorata, Reeve, which is found in the Gulf of Suetmay in future be called M. crassilabrum. 50 NERITINA CORNEA, Linne. (Plate XXXVII. figs. 7, 7 b.) Hab Found living on the stems of tree-ferns, betel-nut palms, |
