MOLLUSCA OF li^J-DIA. 303 



suture slightly impressed ; whorls 4|, the three apical small ; 

 aperture circular, slightly angulate on upper margin, with four 

 distinct crenuJations below ; peristome double, thickened, not 

 expanded, crenulation only slightly shown on outside, the inner 

 sharply folded back ; columellar margin rounded ; operculum 

 smooth, black. 



Size : maj. diam. 4-5 : alt. axis 3"o mm. 



This may be compared with the Dafla Hill species A. hurtii and 

 A. rugosus, but the form of the aperture differs considerably. 



Aetcjius bhahma, G.-A. jS'o. 2610 B.M. 



Moll. Ind. Vol. I. pt. V. (1884) p. 195, pi. xlviii. fig. 3. 



A variety of this species was also found by Mr. Ogle in the 

 Dihing valley, Singpho Hills, No. 2611 JB.M. 



ALYCiEus DisTiucTus, G.-A., var. (Plate CXXXVIl. figs. 2, 

 2 a, 2 6.) 



Locality. Sadia, No. 2620 B.M. (J/. Ogle). 



This shell differs from the typical form in the Western Naga 

 Hills in its flatter depressed shape, rounded aperture, and the 

 shorter distan'ce from it to the sutural tube. It was also found 

 in the Dihing valley at 500 ft. (M. Ogle). No. 2626 B.M. 



Altcj^us (DioKTx) trENijLA, Bs., var. GLOBOsrs. (Plate CLIII. 

 fig. 8.) No. 2532 B.M. Coll. 



Locality. Brahmakund, E. Assam {M. T. Ogle). 



Shell globosely and depressedly conical, scarcely perforate ; 

 sculpture, extremely fine costulation next the sutural tube and 

 still farther back, the upper whorls smooth ; colour pale whitish 

 brown ; spire depressed, apex blunt ; suture moderately im- 

 pressed ; sutural tube moderately long ; whorls 4, tumid, con- 

 stricted close behind the peristome, distance of this last to base of 

 sutural tube very short ; aperture circular ; peristome double, 

 much thickened, sharply and shortly reflected; operculum dis- 

 tantly spiral, central whorl conspicuous, colour dull yellow. 



Size : maj. diam. 4*0 ; alt. axis 3'75 mm. 



Altc^tjs (CxcLORTx) GEAPHicxis, var. DiHiNGBNsis. (Plate CXLVI. 

 figs. 6, 6 a.) No. 2516 B.M. 



Locality. Sadia, Assam, 350 ft. {M. Ogle). 



Shell : umbilicus covered by expansion of outer lip, tumidly 

 conical ; sculpture above somewhat distant regular costulation, 

 there are 4 costse next the sutural tube, 3 distant well developed 

 behind the aperture, in another specimen two only ; colour very 

 pale ochraceous ; spire high, apex fine ; suture impressed, the tube 

 short and oblong ; whorls 4, well rounded ; aperture circular, 

 subvertical ; peristome expanded and slightly reflected, double. 



