MOLLUSCA OP INDIA. 365 



rather close costulation on the apical whorls, strong and close- 

 set next the sutural tube, becoming gradually finer posteriorly ; 

 colour bleached ; spire high, conical, apex fine ; suture impressed, 

 sutural tube very long; whorls 4i, well rounded on the sides, the con- 

 striction is short ; aperture ovately circular, subvertical ; peristome 

 double, deeply and sharply crenulated, 4 deep channels running 

 backwards separated by V-shaped barriers, and much thickened as 

 viewed from the side ; columellar margin well curved. 



Size : maj. diam. 4-58 ; alt. axis 2*7 mm. 



This may be compared with A. vesica from the same great 

 vallej-", but its spire differs and the crenulation is sharper and 

 finer. It maybe also compared with A. Johitensis from Brahma- 

 kund, but the difference is quite specific. All the specimens are 

 bleached and fragile and evidently picked up on a jungle clearing 

 after the timber was fired. 



Altcetts dfoculmen, n. sp. (Plate CLVII. figs. 2, 2 «.) 



Locality. Tsanspu Valley, No. 3582 B.M. {Lt. G. F. T. Oal-es, 

 R.E.). 



Shell globose-conoid, somewhat depressed, openly umbilicated ; 

 sculpture fine indistinct, costulation on upper whorls showing 

 near the suture, apex smooth, very fine and close near sutural 

 tube; colour whitish grey above, pale ochraceous on the swollen 

 part of the whorl ; spire depressedly conoid, apex small ; suture 

 impressed, sutural tube rather short ; whorls 4, the last much 

 swollen behind the sharp constriction, in front the whorl is crossed 

 by a well-raised ridge, a narrow furrow, and then another ridge, 

 narrowing to a point below ; aperture angularly and widely ovate, 

 oblique ; peristome double, much thickened, refiected, subangulate 

 above near suture, rounded on the periphery of the whorl, then 

 descending, witli indistinct crenulation up to the subvertical 

 columellar margin, which is thickened below ; operculum black, 

 placed too far in to see the spiral. 



Size : maj. diam. 4*75; alt. axis 2'25 mm. 



Only one specimen was found, but that a most perfect one, and 

 very distinct from such double-ridged species as hirugosus, multi- 

 rugosus, &c., also in the angulate form of the aperture. 



Altcjeus ltttobensis, n. sp. (Plate CLVII. figs. 6, 6 a.) 

 No. 3527 B.M. 



Locality. Luyor, Abor Hills, 7200 ft. (Lt. G. F. T. Oakes, R.E.). 



Shell globosely turbinate, umbilicated ; sculpture, very fine close 

 regular costulation next the suture, very fine on whorls above, 

 hardly seen on apical ; colour dull white above, pale ochraceous 

 on the swollen portion of the last whorl ; spire moderately high ; 

 suture moderately impressed, sutural tube moderately long ; 

 whorls 4^, constriction short, no swelling betM'een sutural tube 

 and aperture ; aperture circular ; peristome double, very slightly 



