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Show 1892.] SPECIES AND VARIETIES OF DIPLOMMATINA. 515 Constriction on the side, behind the peristome ; last whorls DIPLOMMATINA KHUNHOENSIS, n. sp. Loc. Khunho Peak and Trigonometrical Station, 8809 ft. above the Mao villages, Naga Hills (in coll. II. H. G.-A.). Shell dextral, ovately fusiform, not rimate ; sculpture, fine regular costulation onthe3rd,4th, and 5th whorls, the 2 apical smooth, the last whorls polished and glassy ; colour pale sienna ; spire, side flattened near the apex, which is somewhat acuminate ; suture impressed; whorls 8, the antepenultimate the largest; constriction behind the aperture on the penultimate whorl ; aperture oval and vertical ; peristome double, strong, continuous; columellar tooth well developed, rather remote. Size: maj. diam. 2*2 ; alt. axis 4*8 to 5'2 millim. Six specimens were found. A form rather longer and less swollen occurs in the same range; about 30 specimens were obtained at Gnameh Peak (5585 feet), near the Barak River. There is another form much smaller, being only 3-5 in length, with the same glassy last whorls and the constriction rather further back, behind the aperture. Examples of this were also found at Sikhamih, in the Lahupa Naga Hills. I distinguish this variety as khunhooensis, var. minor. DIPLOMMATINA LAPILLUS, n. sp. Loc. Kopamedza Peak, Lahupa Naga Hills, 8375 ft.(Godw.-Aust.). Shell dextral, elongately fusiform, tumid below, not rimate; sculpture fine, regular, close costulation, which is often much worn down ; colour (bleached) ; spire with sides flattened, apex acuminate ; suture shallow; whorls 8, sides flatly convex, the antepenultimate the largest; constriction of the penultimate whorl on the side, well behind the aperture ; aperture oval, subvertical ; peristome thickened, double, rounded below ; columellar tooth small and far back within the aperture. Size: maj. diam. 3-0 ; alt. axis 6'0 millim. Three specimens, marked from the "north of the Burrail Range." Two are from the typical locality given above. DIPLOMMATINA COMPACTA, n. sp. Loc. South of Barak in Munipur (Godwin-Austen). Shell dextral, small, tumidly fusiform; sculpture, the two apical whorls smooth, two next with fine close ribbing, the last three whorls smooth or glassy ; colour pale ochraceous white ; spire, sides rather flat, apex moderately blunt ; suture slightly impressed; whorls 7£, the antepenultimate the largest and tumid ; constriction on the side, well behind the aperture, at about 1 millim. distant; aperture oval, vertical; peristome double ; columellar tooth large in front, and directed downwards. Size : maj. diam. 1'8 ; alt. axis 3-5 millim. |