1892.] SPECIES AND VARIETIES OF DIPLOMMA.TINA. 5l5 



Constriction on the side, behind the peristome ; last whorls smooth. 



DiPLOMMATINA KHUNHOENSIS, n. Sp. 



Loc. Khunho Peak and Trigonometrical Station, 8809 ft. above 

 the Mao villages, Naga Hills (in coll. H. H. G.-A.). 



Shell dextral, ovately fusiform, not rimate ; sculpture, fine regular 

 costulation ontbe3rd,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 ; columeliar 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, H. 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 ; columeliar 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 7i, the antepenultimate the largest and tumid ; constriction on 

 the side, well behind the aperture, at about 1 milHm. distant ; 

 aperture oval, vertical ; peristome double ; columeliar tooth large 

 in front, and directed downwards. 



Size : maj. diam. 1-8 ; alt. axis 3*5 millim. 



