386 LAND ANB FRESHWATER 



Shell umbilicated, conoid ; sculpture strong, regular, rather dis- 

 tant costulation on the upper whorls, much stronger and closer on 

 the swell of the whorl next the sutural tube, a few finer and dis- 

 tant on the constriction, which continue up to the aperture ; colour 

 Avhitish ; spire conical, fairl}' high ; suture impressed, sutural tube 

 very fine ; Avhorls 4, the last sharply constricted, then rising sud- 

 denly iuto a ridge which expands forwards to the double peristome ; 

 aperture circular, very oblique ; peristome double, distinctly crenu- 

 lated, but not strongly so, tliis is not seen in the figure, which was 

 taken too much from the side to see it well. 



Size : maj. diam. 3"5 ; alt. axis 2*0 mm. 



It is more closely wouud and smaller than A. crispatus. 



Altc^.cs BEDDOMEi, n. sp. (Plate CXLIX. figs. 5, 5 a.) No. 29f 

 Beddome Coll. 



Locality. Xaga Hills. 



Shell very globoscly conoid, rather closely umbilicated ; sculpture : 

 regular, close, costulation next the long sutural tube, indistinct and 

 distant on the U2">per whorls, very fine, close lonjiitudinal liration is 

 very marked ; colour pale umber ; spire rather high conic, apex 

 blunt ; suture very well impressed ; whorls 4, very convex, con- 

 striction slight close to the sutural tube, thence to aperture 

 short ; aperture ovate, subvertical ; peristome double, solid on the 

 outer margin, much reduced in thickness on the inner in four of 

 tliese shells in which the peristome was not so mature, angulation 

 was noted on the outer margin by 2 faint indentations (fig. 5 a) ; 

 operculum rather solid, horny, concentric. 



Size : maj. diam. 4-5 ; alt. axis 2-5 mm. 



There were ten examples of this species in Colonel Beddome's 

 collection, no doubt collected by Mr. Muspratt, most probably from 

 the Eastern Naga Hills. 



Altc^tjs biceenatus, G.-A. (Plate CXLIV. figs, o, 5 rt, 5 h.) 

 No. 2490 G.-A. Coll. B.M. 



Godwin- Austen, J. A. S. B. vol. xliii, pt. 2, 1874, p. 148, pi. iii. 

 figs. 5, 5 rt, 5 h. 



Theobald, Cat. Supp. p. 39. 



G. Nevill, Hand-list, i. 1878, p. 291. 



Original description. — " Shell moderately umbilicated, svib-tur- 

 biuate, pale corneous or nearly white ; fine close ribbing on swell 

 of last whorl, extending to behind the termination of the sutural 

 tube and thence to apex very finely and evenly costulated. Spire 

 dei)ressedly conoid, suture impressed, apex blunt. "VYhorls 4, the last 

 moderately swollen, constriction rather wide, folloAVcd by a single 

 Avell-defined high ridge close behind the expanded portion of the 

 ajicrture, where it is defined by a sharp narrow^ costulate rib. The 

 expanded portion anterior to this is lorgitudinally waved on the 

 surface, produced by two deep triangular grooves yiluated well 



