122 



ZONITIDJi. 



distinguished by its umbilicus, sculpture, &c., besides its very 

 much smaller size. 



Animal light grey. A very small lobe overhangs the small 

 mucous pore. 



c. Shells not exceeding 6 mm. 

 (Generic position very doubtful.) 



a'. Turbinate. 



194. Macrochlamys ? pungi, Theobald (Helix), J.A.S.B. 1859. p. 307; 



Pfr. (Helix) Mon. Hel. v, 1868, p. 134 ; H. & T. C. 1. 1876, 

 pi. 16, tig. 9 ; Nevill, Nanina (Microcystis), Hand-l. i, 1878, p. 38 ; 

 Godwin-Austen (Macrochlamys ?), Mol Ind. i, 1882, p. 90, pi. 14, 

 fig. 1 (shell). 

 Macrochlamys poongi, Theobald, Cat. 1876, p. 19. 



Shell perforate, turbinate, rather thin, chestnut-brown, with 

 very close microscopic sculpture of fine impressed longitudinal 

 lines, hardly visible on the upper whorls ; spire coiioidal, suture 

 deep ; whorls 6J, convex, regularly increasing, the last not 

 descending, rounded at the periphery and below ; aperture almost 

 vertical, roundly lunate; peristome thin, right margin slightly 

 arcuate, columellar slightly expanded, vertical above and trian- 

 gularly reflected. 



Major diarn. 6'5, min. 6, height 5 mm. 



Hob. Moulmein (Theobald, StoliczJca). 



Near M. ? molecula, but larger and higher in the spire. The 

 measurements are those of a large adult shell ; smaller specimens 

 are 5 to 6 mm. across. 



b'. Depressed or conoidly depressed. 

 a". Smooth. 



195. Macrochlamys ? molecula, Us. (Helix) A. M. N. H. (3) iii, 1859, 



p. 389 ; Pfr. (Helix) Mon. Hel. v, 1868, p. 69 ; Stol. (Micro- 

 cystis) J. A. S. B. 1871, 2, 

 H. $ T. (Helix) C. 

 (Microcystis), Hand- 

 i, 1882, p. 88, pi. 16, fig. 8 (shell). 



Shell narrowly perforate, depressedly conoidal, thin, smooth, 

 without longitudinal sculpture, brownish horny, approaching pale 

 chestnut in colour ; spire low, conoid, with convex sides and 

 obtuse apex, suture well impressed ; whorls 5-5|, rather closely 

 wound, convex above, the last rounded at the periphery and 

 convex beneath ; aperture scarcely oblique, broadly lunate ; peri- 

 stome thin, straight, columellar margin oblique, slightly curved, 

 very briefly reflected above. 



Major diam. 5, min. 4, height 3 mm. 



Hab. E-angoon (Theobald}, Moulmein (Stoliczka), common ; also 

 Kalima Doung, near Ava (W. T. B.) ; Assam ? and Khasi Hills ? 

 (teste Nevill) ; Lampun, Siam (Daly, see Proc. Mai. Soc. v, p. 275). 

 A common and widely distributed form. 



Animal grey to black : loot narrow, sole with two grooves. 



