124 ZONITIU.T. 



198. MacrocUamys ? pauxillula. /is. (Helix) A. M. N. H. (3) iii, 

 185U, p. ;WC); Pfr. (Helix) Man. Hel. v, 1868, p. 119; ? H.^- T. 

 (Helix) C. I. 1876, pi. 90, tigs. 7, 8, 9; ^^eviU, Nanina (Micro- 

 cystis), Hand-l. i, 1878, p. 37. 



Shell perforate, depressed, thin, brownish horny, polished, 

 marked with close, very tine, longitudinal (spiral) lines above 

 a)id below; spire convex, suture impressed; whorls 4, convex, 

 regularly increasing, the last rounded at periphery and below ; 

 aperture oblique, broadly lunate; peristome thin, straight, colu- 

 inellar margin curved, expanded and carried slightly forward 

 above. 



Major diam. 2|, min, 2|, height 1| mm. 



Hah. Thayetmyo, Pegu (Theobald, W. T. B.); Prome. 



The specimens described above, though somewhat larger, agree 

 Avith Benson's description and are from the same locality. The 

 shell figured iu the ' Conchologia Indica ' looks difterent, and may 

 be M. curvilabris. 



Another form, also from Thayetmyo, is thicker ; it has a 

 higher, more convex spire, and stronger concentric striation. 

 This may be regarded as a variety. 



F. Species from Andaman and other Islands iu Bay of Bengal, 

 a. iJejjressed. 



199. Macrochlamys choinix, Bs. (Helix) A. M. A. H. (3) vii, 1861, 

 p. 83 ; Ffr. (Helix) Man. Hel. v, 1868, p. 117 ; H .V T. (Helix) 

 C. J. 1876, pi. 51, tig. 1 ; Godwin-Austen, Mol. Ind. i, 1883, p. 102, 

 1^1. 22, tig. 6; ii, 1898, p. 48; id. A. M. A. H. (6) ii, 1888, p. 57. 



Shell obtectly perforate, depressed, thin, translucent, scarcely 

 striated, smootli, with fine, close, spiral (longitudinal) lines, only 

 visible under a strong lens, on the upper surface, brownish hoimy ; 

 spire very low, suture scarcely impressed, almost flat ; whorls 5, 

 flat above, the inner rather closely coiled, the last broader, sub- 

 augulately rounded at the periphery, moderately convex beneath ; 

 aperture oblique, large, broadly lunate; peristome sharp, upper 

 margin arcuate, columellar much curved, vertical above and briefly 

 reflected, partly covering the perforation. 



Major diam. 16, min. 14, height 7 mm. 



Hah. Mount Hax-riet, South Andaman. 



Distinguished by few whorls, much broader last whorl, and 

 the flattened upper surface. The animal, according to Nevill, is 

 very active and throughout black, except the sole of the foot, 

 which is white. 



Macrochlamys choinir, var. gigantea, Xevill (G.-A., P. Z. . 

 1895, p. 446 ; Mol. lud. ii, p. 48), from South Andaman Island, 

 has never beeu described. 



