AMPHIDEOMUS. 181 



columella tvith sliglitly convex inner edr/e, broadly dilated, guttered 

 at its union tvith the body of the shell ; the dilated edge overhanging 

 a rather large umbilicus, and a little thickened where it passes 

 upon the parietal wall. Parietal callus thin and translucent." 

 {Pilshry.) 



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



Alt. 24, diam. 14, longest axis of aperture 12'o mm. 



Hah. India : southern slopes of Khasi and Garo Hills, Assam 

 ( Godwin- Austen). 



Attributed to Sylhet, Eastern Himalayas, by Reeve. Lt.-Col. 

 Godwin-Austen states that its habifat is the southern slopes of the 

 Khasi and Garo Hills, whereas Sylhet is a district in the plains of 

 Lower Bengal, south of the Khasi Hills, and the specific name is, 

 therefore, as Godwin-Austen points out, unfortunately misleading 

 and inappropriate. 



The distinctly greenish-yellow colour of the lower portion, the 

 sack-like base, and the sort of gutter at the root of the columella 

 are said to be characteristic features. 



155. Amphidromus masoni, Godwin-Austen. 



Bulimus masoni, Godwin- Austen, J. A. S. B. xlv, 1876, p. 316. 

 Amphidromus masoni, Fulton, A. M.N. H. ser. 6, xvii, 1896, p. 81, 



pi. 6, fig. 2 ; Pilsbry, Man. Conch, ser. 2, xiii, 1900, p. 189, pi. 62, 



fig. 72. 

 Amphidromus dafinensxs (Godwin-Austen), Nevill, Hand List, i, 



1878, p. 127 (uom. uud.). 



Original description : — " Shell sinistral, acuminately oblong, 

 thick, side of spire rather flat, whorls 7, smooth and shiny, under 

 lens finely and spirally striate, colour sea-green, intenser below the 

 keel, paling towards the apex, the columella dark purple, a narrow 

 fillet of same colour 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." ( Godwin- Austen.) 



Alt. 1'2 [=30-5 mm.], major diam. 0*5 inch [=12-7o mm,]. 



Hah. India: Dihiri Parbat, Uafla Hills, Assam {Godwxn-Austen). 



'• Similar in fox*m to A. sylheticus, but the latter shell is smaller 

 exhibits no trace of spiral striation, has its surface more polished, 

 while the columellar margin and outer lip are pure white ; and in 

 dozens I have collected no trace of band is ever seen. In colour 

 too sylheticus differs in being lemon-yellow with a greenish tinge 

 on the body-whorl." (Godwin- Austen.) 



156. Amphidromus lepidus, Gould. 



Bulimus lepidus, Gould, Proc. Boston See. Nat. Hist, vi, ]856, 

 p. 12; ibid., Otia Conch. 18G2, p. 219; ^Hanley & Theobald, 

 Conch. Ind. 1872, pi. 84, fig. 6. 



Amphidromus lepidus, Pilsbry, Man. Conch, ser. 2, xiii, 1900, p. 190, 

 pi. 63, fig. 99. 



