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Show 1*95.] BOBNEO AND NEIGHBOURING ISLANDS. 123 ultimus penultimum subcequans ; apertura irregulariter rotundata, verticalis; peristoma incrassatum, expansum, duplex, marginibus conniventibus, callo tenui junctis, columellari intus dente acuto munito. Longit. 3 millim., diam 1|. Hab. Kina Balu. Var. Testa minor, paulo angustior, pallide rufescens. Hab. Balabac. The above differences seem hardly sufficient to distinguish this variety from the typical form. 72. DIPLOMMATINA BALABACENSIS. (Plate IV. fig. 12.) Testa minima, elongata, ovato-fusiformis, sordide albida, dextrorsa, imperforata ; anfractus 7-8, convexi, tenuiter lamellati, lamellis supra anfractum penult, confertioribus quam supra; anfr. ultimus penultimo minor, antice ascendens ; apertura verticalis, rotundata; peristoma incrassatum, triplex, marginibus callo tenui junctis, columellari dente minuto intus munito. Longit. 2 millim., diam. |. Hab. Balabac. This is smaller than any of the Bornean species. There is a marked difference in the proximity of the fine lamella?, or threads, upon the penultimate whorl and that above it. The genus Diplommatina has not previously been recorded from this island. 73. DIPLOMMATINA BABITENSIS, Smith. Diplommatina baritensis, Smith, Journ. Linn. Soc, Zool. vol. xxiv* p. 350, pi. xxv. fig. 22. Hab. Kina Balu, Busau, Rumbang, and Banguey Island. None of the specimens from these localities agree exactly with the type from Barit Mountain. In form they correspond very closely, but none are so distinctly and distantly lamellated. Those from Kina Balu, Busau, and Rumbang are of a dirty yellowish tint, becoming reddish towards the apex of the spire, and the peristomes are bright yellow. The specimens from Banguey Island appear almost smooth at first sight, the fine costulation being observable only under a powerful lens. They are pale and subpellucid like the type, and the peristome also is likewise whitish. Some of the yellow lips are rather more thickened than in the typical form. In the figure the spire above the penultimate whorl is not long enough and too broad. Some specimens bear considei'able resemblance to D. concinna, H . Adams, but the penultimate whorl is larger in proportion to the last. 74. DIPLOMMATINA CONCOLOE, Quadras & Moellendorff. (Plate IV. fig. 13.) Diplommatina (Sinica) concolor, Q. & M . Nachrichtsbl. deutsch. mal. Gesell. 1893, p. 182. Hab. Cagayan, Luzon (Q. Sf M.); Palawan (Everett). |