AMPHIDROMUS, GROUP X. 189 



A. SYLHETICUS (Reeve). PI. 63, figs. 97, 98. 



Shell sinistral, umbilicate. ovate conic, polished, striatulate, the 

 first whorl weakly punctulate ; greenish-yellow below the periphery, 

 paler above, fading on the spire, the early whorls and apex whitish. 

 Whorls 5-J, slightly convex, the last but weakly convex above, very 

 convex, full and sack-like below. Aperture ovate, oblique, slightly 

 brown or ochre tinted within; the peristome white, rejlexed; colu- 

 mella with slightly convex inner edge, broadly dilated, guttered at its 

 union with the body of the shell; the dilated edge overhanging a 

 rather large umbilicus, arid a little thickened where it passes upon 

 the parietal wall. Parietal callus thin and translucent. 



Alt. 26, diam. 15, longest axis of aperture 14 mill. 



Alt. 24, diam. 14, longest axis of aperture 12^ mill. 



Western India : Southern slopes of the Khosi and Garo Hills 

 (Godwin-Austen) ; southward to Sylhet ? (Reeve). 



Bulimus sylheticus REEVE, Conch. Icon., pi. 77, f. 564 (Aug. 



1849) PFR., Monogr. iii, p. 322; viii, 42; Conchyl. Cab., p. 68, 



pi. 20, f. 25, 26. HANLEY & THEOBALD, Conchologia Imlica, pi. 

 19, f. 9. GODWIN-AUSTEN Journ. Asiatic, Soc. Bengal, xlv, 1876, 

 pt. 2, p. 316. Amphidromus sylheticus FULTON, Ann. Mag. N. H. 

 (6), xvii, p. 79 (1896) Buliminus (Napanis) sylheticus MAKTKNS 



in Albers, Die Hel., p. 234 A. sinensis var. sylheticu Hens., 



NEVILL (in part), Handlist Moll. I nil. Mus., i, p. 127. 



One of the most northwestern species in distribution. God \\in- 

 Austen doubts its occurrence at Sylhet, but perhaps the district, not 

 the town was intended, in which case the name is appropriate enough. 

 Fulton considers B. lepidus (rid. a synonym. 



The distinctly greenish yellow color of the lower portion, s;ick- 

 like base (particularly noticable in a rear view), and the sort of 

 gutter at the root of the columella, are characteristic features. 



A. MASONI (Godwin-Austen). PL 62, fig. 72. 



"Shell sinistral, acuminately oblong, thick, side of spire rather 

 flat, whorls 7, smooth and shiny, under lens finely and spirally striate, 

 color sea-green, intenser below the keel, paling towards the apex, 

 the columella dark purple, a narrow fillet of same color borders the 

 suture closely below, commencing at the upper and outer angle of 

 the aperture. Aperture oval, angular above, lip slightly reflected. 

 The last whorl slightly keeled " (G.-A.). 



