22 



PROCKEDINGS OK THK MALACOLOUICAL SOCIETY. 



liaving about 8 convolutions. Alt. 44, diam. maj. 53-75, niin. 40 mm. 

 Aperture: alt. 24, diam. 25 mm. 



iTrtJ.— Naga Hills. 



A white-lipped variety also occurs wliicli is otherwise indistinguish- 

 able from tlie type. 



Pterocyclus MARIONS, n.sp. 



Shell somewhat orbicular, moderately depressed, covered with 

 a thin, laminiferous, reddish-brown periostracum ; whorls 4^, regu- 

 larly increasing, the last very obtusely angled at the periphery, and 

 possessing a short, but rather broad, wing-like development just 

 behind tlie labrum ; suture very deeply impressed ; umbilicus wide, 

 deep ; labrum retle.xed, white, laminiferous, continuous but for a slight 



break below the wing-like projection; aperture circular; operculum 

 corneous, convex above, with central nucleus, bearing several raised, 

 more or less foliaceous laminje, which are especially strong towards 

 the outer margin, below concave, polished, shining. Alt. 8, diam. 

 maj. 20, min. 15 mm. Aperture: alt. 7, diam. 7 mm. 

 Jlab.—l^aga Hills. 



Alyc^us (Charax) peilei, n.sp. 



Shell irregularly discoidal, moderately depressed, white ; whorls 4, 

 the last gibbous, thin, strongly strangulated, and again becoming 

 gibbous just behind the labrum, sculptured with fine, somewhat 



