1893.] SPECIES OF THE LAND-MOLLITSCAN GEjSTTS AITC.^FS. 593 



examples of the same shell, which have led me to I'ecompare the 

 two forms. 



1. Al/TCEdS BI-BUGOSirS, 11. 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 ochraceous 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 ou 

 the inner margin. 



Operculum pale in colour, smooth in front. 



Size : maj. diam. 3"0; alt. axis 1-25 ram. 



The specimens were 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 Xaga Hills to Munipur. 

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

 A. multirur/osus, Gr.-A., of the Xaga 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. Ai,Tc.a;rs sttbculmex, n. sp. 



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



SJiell globosely turbinate, solid, closely perforate ; sculpture, 

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

 the swell of the last whorl ; 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"7o ; alt. axis 1*5 mm. 



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

 it approaches A. conicus from Jaintia and A. vestitis from the 

 Arakan Hills. 



3. Axtcj:t7S (Diortx) GE.A:NTm, n. sp. 



Locality. Margarita, foot of Eastern Naga HiUs (W. DoJierty, 

 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 ueai-est ally, a variet}'' of 



