19 



CHAEACTEES OF NEW LAND AND FEESHWATEE SHELLS 

 FEOM THE NAGA HILLS, ASSAM. 



By H. B. Preston, F.Z.S. 



Bead 9th January, 1914. 



AUSTENIA TIGRIS, 11. Sp. 



Shell elongately ovate, rather flat, polished, shining, spirally rayed 

 with bands of a darker colour, which are especially noticeable on the 

 upper part of the last whorl and on the base of the shell ; wliorls 2, 

 the first very small, pale yellowish -white, the last rapidly increasing 

 in size, rather coarsely marked with radiate lines of growth, and 



somewhat malleated ; suture impressed ; labrum thin, membranaceous ; 

 aperture auriform ; interior of shell slightly nacreous in places. Alt. 

 11, diam. maj. 31, min. 19mm. Aperture: alt. 19, diam. 24 mm. 

 Ifrtb. — Naga Hills, Assam. 



..^GISTA COENI, n.sp. 



Shell broadly turbinate, dark reddish-brown ; whorls 6, regularlj' 

 increasing, not very convex, marked with closely set, oblique growth 

 striae ; base of shell also marked with lines of growth, and very finely 



spirally striate ; suture well impressed ; umbilicus wide, deep ; 

 columella whitish, diaphanous, rather broadly outwardly expanded 

 above, obliquely descending; labrum not thickened, narrowly 



