PEESTON : OX MOLLUSCA FROM ASSAM. 23 



distant, transverse, arcuate striae, wliich 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 broad in front, the other narrower above ; 

 aperture irregularly sub-circular. Alt. 4, diam. maj. 6'5, min. 

 5'5mm. Aperture: alt. 1"5, diam. l'75mm. 

 Bab.— ^aga Hills. 



DiPLOMMATINA FRUMENTXTM, n.Sp. 



Shell fusiform with acute apex, pale - yellowish horn -colour, 

 somewhat shining ; whorls 8, the first six regularly increasing, tlie 

 seventh broad and convex, the eighth swollen, but smaller, sculptured 

 with fine transverse striae ; suture impressed ; columella descending 



vertically, bearing a rather fine, oblique plait situated well within 

 the aperture, and diffused above into an arched, well-defined callus, 

 which joins the upper margin of the labrum, and which is obliquely 

 furrowed in the middle ; labrum whitisli, broad, somewhat thickened. 



