368 LAND AND FRESHWATER 



Altcj^tjs VESICA, n. sp. (Plate CXLIX. fig. 10.) No, 3101B.M. 



Locality. Bapu Peak, Abor Hills (Lt. G. F. T. OaJces, B.E.). 



Shell very globosely conoid, with a strong epidermis ; sculpture, 

 strong close costulation from the long sutural tube backwards on 

 the swollen portion of the whorl, becoming very fine on the whorls 

 above ; colour pale ochraceous brown ; spire rather high, apex 

 small and fine; suture impressed ; whorls 4^, closely-wound, con- 

 striction short, smooth, then swelling much round to the left front 

 of the shell ; aperture oval, angulate on upper margin, subvertical ; 

 peristome strongly crenulated, with four deep channels, double, 

 thick, vertical and sinuate on the columellar margin. 



Size: maj. diam. 6'75 ; alt. axis 4*0 mm. 



Alcy.^eus TAMNAYENsis, n. sp. (Plate CLYI. fig. 2.) No. 3114 

 li.M. Coll. 



Locrilif,/. Yamne Valley, Abor Hills (Lt. G. F. T. Oahes, R.E.). 



Shell umbilicated, very globosely conoid ; sculpture above fine, 

 distinct horizontal strife superimposed by fine regular and distant 

 costulation— fine regular costulation on the swollen part next the 

 sutural tube ; spire high, apex small, acute ; suture impressed, 

 the sutural tube very long ; whorls 5, the last very rounded and 

 swollen ; the constriction is sharp, the distance to the aperture 

 short, smooth, and nearly flat ; aperture irregularly oval, curving 

 above, nearly vertical on the columellar side ; peristome thickened, 

 double and strongly crenulate on the outer margin, with three 

 conspicuous ridges, above these the inner lip is much thickened, 

 the outer lip has a marked expansion on the inner lower margin. 



Size of type : maj. diam. 7'25 ; alt. axis 4*0 mm. 

 „ largest : „ 7*75 mm. 



This species is of the type of A. or/Ici of the Noa Dihing Valley, 

 south of the Brahmaputra, but is far larger, more globose, with a 

 finer apex and much stronger peristome. A. ahorensis is also 

 a close ally, but difi'ers in form, slight crenulation, and the very 

 difterent costulation on the s-well of the last whorl. 



From Shimang, on the Dihang, Lt. G. F. T. Oakes, R.E., has 

 sent me an Alycceus, No. 3144 E.M., very close to A. yamneyensis, 

 but smaller, only 6*5 in major diameter; it is represented by seven 

 specimens. 



Alycjsus (Dioetx) globulosus, n. sp. (Plate CLVII. figs. 1, 1 a.) 

 No. 3528 P.M. 



Locality. Luyor, Tsanspu Valley (Lt. G. F. T. OaTces, R.E.). 



Shell globosely conical, closely perforate ; sculpture, a strong 

 epidermis, with irregular transverse stria3 of growth and with 

 streaks of brown ; spiral striation is indistinctly seen, on swollen 

 portion very regular close flat costulation; colour pale umber- 

 brown ; spire low, apex blunt ; suture well impressed ; whorls 4, 

 tumid, the last reflected just behind the aperture ; aperture 



