68 Contributions to Indian Malacology. [No. 2, 
that species is very different. This small form differs from NV. hypoleuca 
in its more marked spiral sculpture, which, however, is still microscopic. 
Section Hemiplecta. 
4, N. unposa, n. sp, 
Shell narrowly umbilicated, depressed, rather solid, white (? horny 
when fresh,) peculiarly marked with irregularly sinuous close spiral 
sculpture resembling scratches, and crossed by oblique lines of growth. 
Spire very depressly conoid ; apex obtuse ; suture impressed. Whorls 
5, rather rapidly increasing, somewhat convex; the last broader, 
rounded at the periphery and below; the spiral sculpture passing 
over the periphery and gradually dying out on the lower surface, 
which is marked by radiating striz. Mouth diagonal, broadly lunate, 
equally broad and high; peristome simple, acute; margins distant, 
united by a callus ; columellar margin oblique, shortly reflexed above. 
Millem. inch. 
Major diameter,.........s....000 36 1.45 
WMIMOF GHG, oF eee nasesinmenss ands 31 1.24 
aagwompes yonlyh * sentdo 21 0.84 
Aperture 18 millem. broad. 
Habitat—Shan Hills, east of Ava. Distinguished by its peculiar 
sculpture ; which somewhat recalls that of Nanina Humphreysiana, 
Lea. All the specimens found were dead and bleached ; fresh speci- 
mens possibly possess a coloured epidermis. 
Section Sesara. 
5. N. WELICIFERA, Nn. sp. 
Shell imperforate when adult, but with a deep umbilical hollow ; 
young specimens deeply perforate ; conoidly trochiform, subeampanulate, 
thin, horny, sharply and arcuately costulated above, the costulation 
continuing over the periphery; smooth, polished and finely striated 
beneath. Spire conoid, sides convex ; apex rather obtuse; suture im- 
pressed. Whorls 7—73, closely wound, convex, increasing very 
slowly ; the last angulate at the periphery in adults, sharply keeled in 
immature specimens, flattened beneath, more convex near the mouth, 
with one or two small, irregularly shaped indentations, (which are 
mostly opaque from a coating of white callus within the shell), on the 
lower surface, generally at a distance of about 4 a whorl from the 
OO 
