HACKOCHLAMYS. 103 



349. Macrochlamys Ihotaensis, Godicin-Austen, Mol. Ind. \, 1883, 



p. 107, pi. 23, fig. 5 (shell) ; id. t. c. ii, 1897, p. 49. 

 Macrochlamys marshalli, Try on t Man. Conch, pt. 2, 1886, p. 101. 



Shell very much like that of M. decussata, but having a broader 

 last whorl and different sculpture. The longitudinal (concentric) 

 striation on the whorls above and below is much stronger than, 

 the transverse and looks almost costulate under a microscope. 

 Subumbilicate, depressed, thin, dark brownish horny ; spire low, 

 suture scarcely impressed; whorls 7, flatly convex, the last 

 rounded at the periphery, flattened below; aperture broadly 

 lunate, subovate, columellar margin oblique, scarcely reflected. 



Major diam. 23, min. 20, height 10| mm. 



Hab. Lhota Naga Hills (Godwin- Austen). 



I have only seen one specimen of this shell, the type, which is 

 immature. 



150. Macrochlamys rubellocincta, Blf. (Nanina) J. A. S. B. 1870, 2, 



p. 14, pi. 3, fig. 9 ; H. 8? T. (Helix) C. I. 1876, pi. 51, figs. 5, 6 ; 

 Pfr. Mon. Hel. vii, 1876, p. 121. 



Shell perforate, depressed, thin, smooth, somewhat polished 

 above, more so beneath, finely decussated above with microscopical 

 transverse slightly flexuous striae and fine longitudinal impressed 

 lines, the latter wanting below; inner half of each whorl whitish 

 horny, outer half rufous, the latter colour forming a broad belt 

 round the periphery; spire almost flat, suture very shallow; whorls 

 6-6|, slightly convex above, the last subangulate at the periphery, 

 moderately swollen below; aperture slightly oblique, broadly 

 lunate; peristome thin, basal margin subarcuate, columellar 

 inclined, reflected briefly above. 



Major diam. 35, min. 31, height 14 mm. A smaller specimen 

 measures 31 by 28 by 12 mm. 



Hab. Habiang Garo Hills (Godwin- Austen). [This shell has 

 only been found on the Nummulitic limestone south of the 

 Tindku Peak ; the animal was not seen.] 



This is near decussata, but is distinguished by being much flatter 

 above and by its very different coloration and sculpture. 



151. Macrochlamys bilineata, Godwin-Austen, J. A. S. B. 1876, 2, 



p. 311 pi. 8, fig. 9. 



Shell imperforate, subglobosely depressed, very thin, trans- 

 parent, polished, brownish horny, beneath the microscope very 

 minutely and closely longitudinally striated, the striation not 

 easily seen ; spire low, suture impressed ; whorls 5, convex, the 

 last well rounded at the periphery and beneath ; aperture oblique, 

 roundly lunate ; peristome thin, slightly arcuate above and at th^ 

 base, columellar margin curved, vertical above, slightly reflected. 



Major diam. 12, min. 10, height 6 mm. 



Hab. Tanir Lampa ridge, 4000' ; Dafla Hills, north of Assam. 

 Abundant in forest amongst fallen leaves (Godwin- Austen). 



