352 LAXD AND FRESnWATER 



3. The Dafla HilJs. 

 The valley of the Dikrang aud its tributaries. 



AxYCMVh AKHAENsis, n. sp. (Platc CXLI, figs. 1, 1 a, 1 h.) 



Localiiy. Earowli Gorge, Durrang District, Assam, foot of the 

 Akha Hills (Type Xo. 26S3 E.M.). 



Shell globosely conical, openly umbilicated ; sculpture very fine, 

 close costulation, flattened as it were, the separation indicated by a 

 line line next the sutural tube, which is short, smooth on anterior 

 part of the last whorl ; strong distant costulation succeeds the fine, 

 becoming finer and more indistinct towards the apex ; colour 

 umber-brown ; spire rather high ; apex blunt ; suture impressed ; 

 whorls 4, well rounded, the last crossed by a ridge in front of the 

 constriction, and b}' another, less conspicuous, intervening between 

 it and the peristome ; peristome double, thickened ; columellar 

 margin slightly sinuate, much sinuated on the outer margin, with 

 four indistinct creiuilatious, one distinct on the lower margin. 



Size : maj. diam. 3-0 ; alt. axis 1*5 mm. 



Only a single specimen — but it is fully grown and distinct. 



Altcjeus barowliensis, n. sp. (Plate CXLI. fig. 4.) 



LocaUtj/. Barowli River, Akha Hills, Durrang, Assam. A single 

 specimen (Xo. 272'3 B.M,) (Godwin- Austen). 



Shell conoid, compact, narrowly umbilicated; sculpture: distant 

 costulation on the upper whorls, very fine and close next the sutural 

 tube, smooth anterior to it up to the peristome ; colour bleached ; 

 spire high, conical ; apex blunt ; suture moderately impressed, 

 sutural tube long ; whorls 4, constriction slight, distant from 

 aperture, a slight swelling between the two apertures oval, rounded 

 below, subangulate on the lower outer margin, rounded on the 

 columellar side ; peristome double and much thickened. 



Size : maj. diam. 3-0 : alt. axis 2-0 mm. 



A very distinct species, not at all like ^1. burtii from the same 

 locality. Westward of this for four degrees of longitude in the 

 Bhutia country we know nothing of the land mollusca. 



Altceus buetii, G.-A. (Plate CXLIV. figs. 8, 8 a.) 



Godwin-Austen, J. A. S. B. 1874, xliii. (2) p. 149, pi. iii. 

 figs. 9, 9 a (Type Xo. 2492 B.M.). 



Original description : — '" Shell turbinate, openly umbilicated, 

 thick, pale ochreous ; shallow but well marked ribbing on swell of 

 last whorl and finely costulated on the apex. Spire conoid, apex 

 sharp, suture well impressed. Whorls 5, the last moderately 

 swollen, constriction very slight, short, and smooth up to the 

 peristome ; sutural tube moderate, rather large at base. Aperture 

 oblique, laterally oval, angular on inner upper margin, with 4 well 



