252 ZOSITWJE. 



slightly oblique, very roundly lunate ; peristome thin, columellar 

 and part of the basal margin slightly expanded. 



Major diani. 4, ruin. 3^, height 3| mm. 



Hal). Khasi, Jaintia, and Naga Hills. 



The above measurements are from a Khasi Hill specimen. 



Benson's type from Terai Grhat measured 4| x 4x 4 mm. This 

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

 p. 162). 



384. Kahula polyplenris, Blf. (Helix) J. A. S. B. 1865, 2, p. 76: 

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



Helix pachypleuris, Pfr. Mon. Hel. vii, 1876, p. 138 ; \Godivi 

 Austen, Mot. Ind. ii, 1907, p. 219, pi. 117, tig. 2]. 



This shell is very near E. bascauda, 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. 



Hob. Arakan Hills, Pegu. 



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

 the Khasi H. bascauda. This is in favour of JNevill's view that 

 the two are varieties of one form. 



[385. Rahula bascaudula, Godwin-Austen, Mol Ind. ii, 1907, p. 219, 

 pi. 117, fig. 7 (shell). 



Original description : Shell very 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. Whorls 6 ; aperture quadrate ; peristome thin, angu- 

 late on lower outer margin, columellar margin subvertical. 



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



Hob. R/isett chu and Richila Peak, Daling District. 



This shell is very close to that of R. bascauda ; 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, Godwin-Austen, Mol. 2nd. ii. 1907, p. 220, 

 pi. 117, fig. 5 (shell). 



Original desertion : 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 5-0 mm. 



Hab. Dikrang Valley, Dana Hills (Godwin-Austen). 



This interesting form can at once be distinguished by the 

 absence of the lirate keel of R. bascauda and its allies.] 



