252 zoNiTiD.i:. 



slightly oblique, verj' roundly luuate ; peristome thin, coluniellar 

 and part of the basal margin slightly expanded. 



Major diam. 4, miu. 3|, height 3| mm. 



Hah. Khasi, Jaintia, and Naga Hills. 



The above measurements are from a Ivhasi Hill specimen. 



Benson's type from Terai Ghat measured 4i x 4x 4 mm. This 

 and the next two somewhat resemble Khasiella hyha (no. 254, 

 p. 162). 



384. Rahula polypleuris, BIf. (Helix) J. A. S. B. 1865, 2, p. 76; 

 Pfr. (Helix) Mon. Hel v, 1868, p. 136. 

 Helix pachypleuris, Pfr. 3Ion. Hel. vii, 1876, p. 138 ; [Godwin- 

 Austen, Mol. Ind. ii,"l907, p. 219, jjI. 117, tig. 2]. 



This shell is very near R. hascauda, but the sculpture is finer 

 and closer, though still regularly costulate ribbing, the spire is 

 lower and the umbilicus rather more open. 



Major diam. 4, minor 3|, height 3. 



Hah. Arakan Hills, Pegu. 



A shell from the Jyntia Hills agrees better with this than with 

 the Khasi B. bascauda. This is in favour of ISevill's view that 

 the two are varieties of one form. 



[385. Rahula bascaudula, God^cin-Austen, MoL Lid. ii, 1907, p. 219, 

 pi. 117, fig. 7 (shell). 



Original description : — Shell ver}^ openly umbilicated, trochiform, 

 flat on base, sharply keeled, with fine carination ; sculpture very 

 close fine costulation, oblique ; colour chestnut-brown ; spire 

 conoid, apex rather blunt, sides very slightly convex ; suture 

 impressed. AVhoi-ls 6 ; aperture quadrate ; peristome thin, angu- 

 late on lower outer margin, columellar margin subvertical. 



Size : major diam. 4*50, alt. axis 3-0 mm. 



Hab. Eisett chu and Kichila Peak, Baling District. 



This shell is very close to that of E. hascauda ; but placed side 

 by side these differences are to be noted : a blunter spire, side of 

 spire more convex, and principally in the umbilicus being very 

 much wider.] 



[386. Rahula daflaensis, Godidn-AusteH, Mol. Ind. ii. 1907, p. 220, 

 pi. 117, fig. 5 (shell). 



Original description : — Shell deeply umbilicated, globosely 

 conoid ; sculpture distant, raised, oblique, sinuate costulation ; 

 colour pale sienna-brown ; spire conic, sides slightly convex ;, 

 suture moderately impressed. Whorls 7, convex, indistinctly 

 angular at the periphery near aperture ; aperture semiovate ; 

 peristome thin, the columellar margin scarcely thickened. 



Size : major diam. 4-2, alt. axis 3*0 mm. 



Hab. Dikrang Valley, Dafia Hills {Godwin- Austen). 



This interesting form can at once be distinguished by the 

 absence of the lirate keel of B. hascauda and its allies.] 



