1865.] Contributions to Indian Malacology. 79 



apex obtuse ; suture impressed, subcrenulate. Whorls 6J, slightly- 

 convex ; the last ascending a little towards the mouth, and exceeding 

 J of the shell in length. Aperture vertical, truncately semicircular ; 

 peristome obtuse, slightly thickened; margins joined by a callus; 

 columella very much curved, projecting forwards at the base,, subver- 

 tically truncated within the peristome. 



Millem. inch. 



Length, 7 0.28 



Diameter, ... 3f 0.14 



Length of aperture, 2f 0.11 



Habitat — Lawady valley, Pegu : common. 



A pretty little species, darker in colour than any of its allies, except: 

 perhaps A. gemma, Bens., and easily distinguished from all, by the 

 columella being more arcuate, also by its more acuminate spire and 

 blunter apex, and its much stronger sculpture. 



20. A. eerten-uis, n. sp. 



Shell very slender, turrited r thin, light horny,, polished, closely, 

 minutely, and rather irregularly striated. Spire subulate, somewhat 

 acuminate towards the blunt. apex; suture impressed, subcrenulate. 

 Whorls 11 — 12, convex, the last about \ the length of the spire. 

 Aperture oblique, ovately pyriform, peristome thin, margins united by 

 a thin callus, columella moderately curved, obliquely truncated. 



Millem. inch. 



Length, 20 0.8 



Diameter, , 4| 0.18 



Length of aperture, 4 0.16 



Habitat — Tongoop, Arakan. 



Var major, length 26 J millem. ; diameter 6 ; length of aperture 6. 

 Of another specimen ; length 23 millem. ; diameter 5f ; length of aper- 

 ture 5^. 



Habitat — Pyema Khyoung, Bassein district, Pegu. 



A mueh more slender species than A. tenuispira, Bens., (a variety of. 

 which also abounds in parts of Pegu,) though there are signs of a 

 passage. The present appears to replace A. tmuispira in Arakan and 

 Bassein. Mr. Benson, to whom I sent a specimen, observes that it is 

 intermediate between. A, tenaisjjira and A. hastala, Bens. 



