MOLLTJSCA OF INDIA. 397 



circular ; peristome double, both, lips close and slightly expanded. 

 Operculum black, smooth and concave in front, convex at back, 

 with a central boss. 



"Major diam. 0-32", minor diam. 0-27"; alt. 0-29"; diam. of 

 aperture 0*15"; sutural tube U*15". 



^'■Habitat. Neighbourhood of Asa'lu, rather local in its distri- 

 bution, but then abundant. 



" Its well costulated surface distinguishes it from the preceding 

 variety of A. inyrami." 



In 1874 I gave the following localities in the Naga Hills and 

 Munipur ; Kezakenomih, Eopamedza, Prowi, Laisen, and Nong- 

 maichmg. 



A. nar/aensis, small variety, Eastern Naga Hills (No. 286. 12.iv.l6 

 Bedd. Coll. B.M.), is smaller than the type. Four specimens were 

 collected by Mr. Muspratt. 



ALTCiEUs NowGONGENsis, H. sp. (Plate CXXXVII. figs. 4, 4 a, 

 4 6.) 



Locality. Koliaghur or Koliahur, Nowgoug District, Assam 

 (No. 2682 B.M.) {Godwin- Austen). 



Shell rather openly umbilicated, depressedly turbinate ; sculp- 

 ture : fine regular costulation, terminates short of the length of the 

 sutural tube, succeeded by well-marked distant ribs ; colour white, 

 bleached ; spire conic, somewhat depressed ; suture well impressed, 

 sutural tube moderately long ; whorls 4, well rounded, the last 

 constricted close to base of sutural tube, then slightly swollen 

 diagonally forward to the peristome ; aperture circular, simple, 

 slightly angulate at upper outer angle ; peristome double, the outer 

 reflected and spreading outwards. 



Size : maj. diam. 3'0 ; alt. axis 1'4 mm. 



In the form of the inflation in front of the constriction this 

 species recalls A. diagoniiis, but its shape is quite different and it is 

 much more openly umbilicated. I found this single specimen on 

 the low granite hill of Koliaghur in the ruins of an old temple. 

 The Brahmaputra washes the base of the hill, a terminal spur from 

 the Lhota Naga Hills on the south. 



Altc^its peilei, Preston. 



Alycceus {Char ax) peilei, Preston, Proc. Malac. Soc. vol. xi. p. 22, 

 March 1914 ; with photographed figure. 



Original description : — " Shell irregularly discoidal, moderately 

 depressed, white ; whorls 4, the last gibbous, thin, strongly stran- 

 gulated, or again becoming gibbous just behind the labrum, 

 sculptured with fine, somewhat distant, transverse, arcuate striae, 

 which become closely crowded on the last whorl ; suture rather 

 deeply impressed ; tube about 3 mm. in length ; umbilicus rather 

 widely ovate, deep ; columella obliquely curved ; labrum continuous, 

 double above, treble below, erect, sinuous, having two notches, one 



