594 



Records of the Indian Museum. [Vol. XXII, 192 1.] 



colour, highly polished and sculptured with moderately strong, 

 curved and sinuate, somewhat irregular striae. The spire is 

 reduced to a mere tubercle but consists of two distinct whorls 

 and is set on the body-whorl at a slight angle and directed 

 outwards. The apex is minutely rounded and the penultimate 

 whorl, though very small, swollen and oblique. The body-whorl 

 is not at all tumid, but subcylindrical with nearly parallel sides 

 and about twice as high as broad ; its anterior extremity is broad- 

 ly rounded. The aperture, which is almost straight, is narrowly 

 ovate, pointed above and about twice as high as broad. The 

 outer lip is sharp and nearly straight, as is also the columella, which 

 is slightly folded and ridged above. There is a feebly developed 

 callus joining the outer lip to the columella. The shell is imper- 

 forate. All these characters are very uniform in a large series of 

 shells. 



Fig. 20. — Shell of S!iicci-)2en eleganftor. Annandale, from Manipur. 



Measurements of Shells (in millimetres) 



Type Specimen. — No. M 11861/2 Zool. Surv. Ind. {Ind. Mus.). 



The species is, so far as we know, confined to Manipur Valley. 

 It is found in abundance round the Loktak Lake and has also 

 been met with sparsely at other places in the valley. It lives in 

 damp locaUties, at the edge of the lake and other swamps and at- 

 tached to various floating objects. Being hghter than water, it 

 was frequently observed floating on the surface of water with its 

 shell downwards and carried about by wind. Living specimens 

 are sluggish on dry land and leave a trail of mucus behind them. 



Our station-book gives the following particulars: — -"Very 

 common on damp mud. Shell fragile and easily removed. Foot 

 narrow, extending for some distance behind the shell and l)luntly 

 pointed posteriorly. Eye-stalks moderately long, tentacles reduced 



