1893,] SPECIES OF THE LAIS-D-MOLLFSCA^" GETSTUS ALTC.EUS. 593 



examples of the same shell, which have led me to recompare the 

 two forms. 



1. Altc.el'S bi-eugosus, n. sp. 



Locality. Khasi Hills and Munipur (in coll. Godwin-Austen). 



Shell globosely turbinate, rather openly umbilicated ; sculpture 

 smooth on upper whorls, regular close ribbing on the swell of the 

 last ; colour pale ocbraceous or ruddy brown ; spire conoid, 

 rounded at apex ; suture impressed ; whorls 4, the last not 

 swollen, contracted in front of the rather short sutural tube, 

 then enlarging again into two parallel ridges, which adjoin the 

 aperture ; aperture ovate, angular above and below, rounded on 

 the inner margin. 



Operculum pale in colour, smooth in front. 



Size : maj. diam, 3"0 ; alt. axis l'2o mm. 



The specimens Mere found in the Khasi Hills, but the exact 

 locality is not recorded. One specimen I obtained south of the 

 Barak River on the road from the Naga Hills to Munipur. 

 Although this shell, in size and most of its characters, is like 

 A. multirugosiis, G.-A., of the Naga Hills, it differs materially, more 

 especially in the form of the aperture and in the ridges on the 

 expanded portion of the last whorl. 



2. AltCjBus stjbctjlmek, n, sp. 



Locality. Naga Hills (W. Doherty, in coll. Aldrich). 



Shell globosely turbinate, solid, closely perforate ; sculpture, 

 smooth on all the upper whorls and polished, close-set ribbing on 

 the swell of the last M'hori ; colour dark ochraceous ; spire conical, 

 apex rounded, blunt ; suture impressed ; whorls 4, round, the 

 last swollen, contracted at base of a short sutural tube, then 

 rising into a depressed ridge, thence expanding and spreading to 

 the aperture ; aperture circular, subvertical ; peristome double, 

 much thickened, simple, continuous. 



Size: maj. diam. 2-75; alt. axis 1"5 mm. 



This is a very distinct species ; in the solid rounded peristome 

 it approaches J. conicus from Jaintia and yL vestitis from the 

 Arakan Hills. 



8. Alyc.^us (Diohtx) granum, n. sp. 



Locality. Margarita, foot of Eastern JVaga Hills ( IF. Doherty, 

 in coll. Aldrich). 



Shell perforate, globose ; sculpture fine regular ribbing, closely 

 arranged and extending to the peristome ; colour ruddy ochre ; 

 spire subconical ; suture well impressed ; whorls 4, rounded, a 

 slight constriction in front of the short sutural tube ; aperture 

 suboblique, circular ; peristome double, the outer reflected 

 slightly. 



Size: maj. diam. 2-25 ; alt. axis 2*0 mm. 



This species is only half the size of its nearest ally, a variety of 



