90 God win- Austen -Descriptions of A lycmnoe. [No. 1, 



river on the border of Munipur ; in this last locality the form is 

 again slightly different with a shorter constriction, and approaches 

 A. conicus, n. sp. 



Alycseus Khasiacus, n. sp. PL III, fig. 4. 



Shell sub-turbinately depressed, openly umbilcated, translucent, 

 varying, much in colour from horny amber to pink and dark red 

 browns, a shining surface, very finely striated under lens, very 

 minute ribbing on the swell of the last whorl ; in some specimens, 

 a faint costulation is seen. Spire depressedly conoid, apex very 

 blunt, often darker coloured than rest of the shell. Suture impressed, 

 whorls 4, well rounded, last moderately swollen, sharply constrict- 

 ed and again enlarging into two vertical ridges, that nearest the 

 mouth being the least developed, and only extending across the 

 upper portion of the whorl, being cut off by the peristome. Con- 

 striction smooth, sutural tube very short and thick at the base. 

 Aperture oblique, round, slightly angulate above. Peristome more 

 or less distinctly double, inner continuous, outer slightly expanded. 

 Operculum multispiral, very concave in front, convex behind, no 

 boss. 



Major diameter, 015".— Minor diam. 0'13".— Alt. 0-09".— Diam. 

 of aperture 07". — Sutural tube, 0-025". 



Habitat. On the highest parts of the Khasi and Jaintia Hills, 

 abundant. 



The very short tube and very fine ribbing on the last whorl, and 

 the plain surface of the rest of the shell, combine to make this 

 a veiy distinct and well marked sjDecies of the genus Alycceus. 



A variety has the aperture less circular, with a distinct notch 

 below, in every other respect it is identical, but a little smaller. 

 All found in Shillong hill station were of this last type. 



Alycseus crenatus, no. sp. Plate III, fig. 5. 



Shell moderately umbilicated, depressedly turbinate, rather thin 

 translucent, pale horny or white, epidermis of former colour, peeling 

 off in old shells, with very fine indistinct costulation throughout, 

 fine close ribbing on the swell of the last whorl. Spire depressly 

 conoid, apex very blunt, suture well impressed. Whorls 4, round- 



