MACKOCHLAMYS. 129 



thin, pale yellowish to rufescent horny, not polished above, more 

 so beneath, transversely striated and with subobsolete rather dis- 

 tant longitudinal (spiral) lines, and obliquely somewhat closely 

 irregularly and flexuously rugate above, faintly decussated and 

 much smoother below; spire conoidal, the sides convex, apex 

 obtuse, suture almost flat ; whorls 5, flatly convex above, the 

 last rather broader, bluntly angulate at the periphery, slightly 

 tumid beneath ; aperture oblique, subovately lunate ; peristome 

 thin, in one plane, columellar margin curved, scarcely vertical 

 above and briefly but broadly reflected, partly concealing the per- 

 foration. 



Major diam. 18, min. 16, height 10 mm. 



Hob. South Andaman. 



Distinguished by its peculiar wrinkled surface. By this young 

 specimens may be separated from M. pseudaulopis, which they 

 otherwise resemble. 



207. Macrochlamys ? perinconspicua, Godwin-Austen (Neiritt, MS.), 



A. M. N. H. (6) ii, 1888, p. 57. 



Shell narrowly umbilicate, conoidly depressed, sublenticular, 

 not very thin, slightly polished above, more brilliantly beneath, 

 marked with fine, close, spiral or concentric (longitudinal) im- 

 pressed lines above and below, brownish horny ; spire conoidal, 

 with the sides convex, apex obtuse, suture impressed ; whorls 5, 

 regularly increasing, convex ; last whorl bluntly angulate at peri- 

 phery, convex beneath ; aperture oblique, subangulately and 

 broadly lunate, subovate ; peristome straight, basal margin, mnch 

 rounded, columellar vertical, slightly reflected. 



Major diam. 7*5, miu. 7, height 4 mm. Smaller shells measure 

 6x5x3-5 mm. 



Hob. Little Brother Island, Andaman group. 



This is probably not a Macrochlamys. 



208. Macrochlamys ? battimalvensis, Godwin-Austen (Nevill, MS.), 



A. M. N. H. (6) ii, 1888, p. 58. 



Shell narrowly umbilicate, depressed, lenticular, compressedly 

 carinate, not thin, smooth, finely transversely striated and decus- 

 sated with microscopic rather distinct longitudinal impressed lines 

 above and below, brownish yellow ; spire low, conoidal, suture 

 almost fiat ; whorls 4|, flatly convex, the last compressed above 

 the prominent keel, more convex beneath, tumid around the deep 

 pervious umbilicus ; aperture oblique, subsecuriforrn ; peristome 

 thin (? immature), straight, columellar margin vertical, rather 

 broadly reflected. 



Major diam. 9-5, min. 8, height 4 mm. 



Hab. Batti Malve, one of the Nicobar Islands. 



This shell is not like any known Macrochlamys. and the only 

 specimen may be immature. 



K 



