MAOROClir-.VMYS. 



121 



whorls .3, not increasini,' rapidly, convex, the last rather broader, 

 rounded 'at the i)eriphery, convex beneath ; aperture slightly 

 oblique, broadly luiuite ; peristome acute, basal margin faintly 

 arcuate, columellar margin curved, vertical and reflected above. 



Major diam. 12, min. 10^, height H mm. 



Ilah. Pegu, the types from Akoutoung on the Irrawady below 

 Prome; also found" at Thayetmyo,and according to Nevill at 

 J3hamo. 



Easily recognized by its ]^)eculiar coloration. The sculpture is 

 often obsolete on the" upper surface, but can generally be seea 

 beneath by the help oF a microscope. 



191. Macrochlamys spreta, Blf. P.Z.S. 1904, ii,p. 445, pi. 25, fig. 12. 



Shell minutely and subobtectly perforate, depressed, thin, 

 smooth, polished, finely striated with microscopical spiral (longi- 

 tudinal) impressed lines above and below ; light rufescent brown 

 (pale chestnut), w hitish at the base around the perforation ; spire 

 low, conoidal, suture shallow; whorls 5, convex, the last rather 

 broader, rounded at periphery, convex beneath ; a])erture oblique, 

 subovately lunate ; peristome thin, straight, columellar margm 

 oblique, slightly reflected. 



Major diam. 8, min. 7, height 3^ mm. 



Hah. Thamandewa, Bassein District, and other places west of 

 the Irrawady River in Pegu. 



This resembles M. hiipoleuca and M. noxia in colour and form, 

 but is distinguished by its marked longitudinal sculpture as well 

 as by its smaller size. 



[192. Macrochlamys andersoniana, XeviU. 



Nanina honesta, car. andersoniana, XeviU : vide Appendix to 



Genus, p. 141. 

 M. IionestH, var. tenuior, XeviU, MS. : vide Appendix, p. 141.] 



[Macrochlamys honesta, Gould, which was inserted here in 

 l)r. Blanford's MS., is placed in a new subgenus.] 



193. Macrochlamys patens, Blf. P. Z. S. 1904, ii, p. 445, pi. 25, Hg. 15. 



Shell narrow ly l)ut perspectively umbilicate, conoidly depressed, 

 sublenticular, smooth, polished, marked with parallel microscopic 

 spiral (longitudinal) impressed lines, not close together, but at 

 irregular intervals, above and below, tawny brown ; spire conoidal, 

 suture slightly impressed; whorls 4^, convex, the last rather 

 broader, bluntly angulate at the periphery, convex beneath, com- 

 pressed around the umbilicus ; aperture diagonal, subtrapezoidal, 

 almost securiform : peristome thin and straight, columellar margin 

 oblique, triangulai'ly reflected. 



Major diam. 7, min. 6, heiglit 3.4 mm. 



Ha'b. Irrawady Valley, Pegu ; Thayetmyo, Bassein. 



In many respects "this shell resembles M. hone!<t((. but is 



