130 zoyiTin.T;. 



G. Species from Indian Peninsnla and Ceylon, having !Rajputana, 



Central India, and Chutia Nagpur on the north. 



(Of tJie (greater number tJie generic affinities are douhtfid.) 



a. Suhglohosely dejiressed or suhturhinate. 

 a'. Lonijitudinal scidpture present {microscopical). 



209. Macrochlamys ? tenuicula, H. Ad. P. Z. S. 1868, p. 14, pi. 14, 

 Ji^. 9 ; Pf. (Helix) Mo7i. Hel. vii, 1876, p. 94; H. ^- T. (Helix) 

 C. I. 18t6, pi. 89, figs. 7, 10; Blf. J. A. S. B. 1880, 2, p. 196, 

 pi. 2, fig. 8. 



Nanina (Macrochlamys) efiulgens, IsevlU {Blf. MS.), Hand-l. i, 

 1878, p. 26. 



Naiiina (Microcystis) tenuicola, Nevill, Hand-l. i, 1878, p. 36 ; Peile 

 (Microcystina), Jour. Bom. N. H. Soe. xi, 1897, pp. 133, 262. 



Shell openly perforate, subumbilicate, turbinate, thin, yellow or 

 fulvous horny, polished, transparent, striatulate, and under the 

 microscope finely decussated on the upper whorls with miiiute, 

 close, impressed spiral (longitudinal) lines ; spire subconical, the 

 sides slightly convex, apex obtuse, suture slightly impressed ; 

 whorls 5g-6, flatly convex above, rather closely wound, the last 

 subaugulate at the periphery (distinctly angulate in immature 

 shells), convex beneath ; aperture oblique, diagonal in the young, 

 roundly lunate ; peristome thin, straight, columellar margin much 

 curved and nearly vertical above, turned back at the perforation. 

 Major diam. 9, min. 8, height 7 mm. 



Hab. Bombay and the Western Ghats, Khandalla, Saltara, and, 

 according to Nevill, Surat. I obtained young specimens in the 

 Eajpipla Hills at Dholgaum. 



The animal is nearly black ; foot very long and narrow ; shell- 

 lobes to mantle small, pointed ; a large lobe above the mucous 

 pore. 



This shell is easily recognized by its turbinate shape. The 

 specimen originally described by H. Adams, 6 mm. in diameter, 

 was immature. Some shells measure 10 mm. in major diameter. 

 The young shell, however, with 4 whorls and the aperture diagonal 

 and almost securiform, is thicker than older specimens and has all 

 the appearance of an adult shell, the peristome being rather 

 blunt. 



b'. JNo longitudinal sculpture. 



210. Macrochlamys fragilis, Hutton (Nanina), /. A. S. B. 1838, 

 p. 216; Pfr. (Helix) Mon. Hel. i, 1847, p. 48; iv, p. 30; Bens. 

 HeHx (Nanina), A. M. N. H. (2) ii, 1848, p. 163. 



Shell openly perforate, subturbinately depressed, thin, polished, 

 smooth, pale umber ; spire conoidal, apex obtuse, suture impressed ; 

 whorls 4|, convex, the last broader and ventricose, obsoletely 

 subangulate at the periphery (more angulate in young), rather flatly 



