3SS LIND AND FRESHWATER 



" This shell is very close to Ahjcceus vestitiis, W. Blanford, hut 

 differs in its smaller size, the upper whorls being quite smootli, 

 and in the ribbing near the sutural tube being more strongly 

 and coarsely marked and in ending abruptly with it." 



Altcji:us conicus, G.-A., var. nanus, G.-A. (Plate CXXXVIII. 

 figs. 6, 6 a, 6 b.) No. 2675 B.M. 



Locality. Jatinga Valley, North Cachar Hills {Godwin- Austen). 



This is a very marked variety of the type species from the 

 Nummulitic Limestone hills of the Kopili Valley some 30 miles 

 distant to the north. It differs first in the much smaller size, next 

 in the height of spire, it is altogether smoother, no sign of any 

 distant costulatiou on the first whorl, which true conicus shows in 

 some specimens. For comparison I give the size of both species : — 



Conicus: maj. diam. 3*0 ; alt. axis 2-2 mm. 

 Dwarf var. ,, 2-6 „ lo ,, 



It also was found in the Jhiri Valley, No. 2693 B.M. (Plate 

 CXXXVIII. fig. 7.) The peristome verj' much thickened. Other 

 examples from Hengdaii Peak, No. 2670, and from Phulong, 

 North Cachar, No. 2609. 



Alyc^us crenatus, G.-A. (Plate CXLIII. figs. 8, 8 rr, 8 6.) 



Godwin-Austen, J. A. S. B. vol. xl. pt, 2, LS71, p. 90, pi. iii. 

 fig. 5. 



Hanley cfe Theob. Conch. Ind. 1870, j). 42, pi. ciii. figs. 2, 3. 

 Figure bad and over-coloured. 



Theobald, Cat. Supp. p. 39. 



G. Nevill, Hand-list, i. p. 291. 



Godwin-Austen, J, A. S. B. vol. xliii. pt. 2, ]874, p. 150. 



Orir/inal description: — " Shell moderately urabilicated,dcpresseflly 

 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 depressedly conoid, apex very blunt, suture well 

 impressed. Whorls 4, rounded, the last moderately swollen, con- 

 stricted close to base of sutural tube, with a marked subvertical 

 ridge just behind the mouth. Constriction smooth, sutural tube 

 long, rather thick ; aperture oblique ; peristome round, deeply 

 waved on the upper and outer but not on the columellar margin, 

 outer lip smooth, slightly expanded. Opcrcrdura multispiral, 

 concave in frout, with a small projecting base at the back. Animal 

 ])ale coloured, tentacles dark brown. 



'•Major diam. 0-18", minor diam. 0-10"; alt. O-H"; diam. of 

 aperture 0'08" ; sutural tube •075". 



JIabitat. On Burrail llange, N. Cachar, at about 5000 feet. 



