GLESSULA, NON-PENINSULAR INDIA TO INDO-CHINA. 89 



denticulate. Aperture oblique, ovate-triangular; peristome 

 simple, acute. Columella abruptly arcuate, obliquely pro- 

 duced, vertically truncate at the base. Length 38, diam. 6.5 

 to 7.5 mm.; aperture 7x4 mm. (Blanf.). 



Khersiong, Himalayas of Sikkim. 



"This species appears to have escaped the notice of all 

 previous collectors in Sikkim; it was found in association with 

 its near ally G. tenuispira Bens., by Dr. Stoliczka during a 

 recent visit. It is easily distinguished from the latter species 

 by its slenderness, (the diameter being % of the length) 

 and the comparative narrowness of the whorls; moreover by 

 the form of the columella, the lower part of which is bent 

 abruptly almost at right angles with the slope of the inner 

 lip; while in G. tenuispira, G. erosa, and other allied forms, 

 the curvature is at the utmost obtuse. Specimens, the shell 

 of which has been slightly weathered, show fine spiral mark- 

 ings, but these are not visible unless the shell has become 

 somewhat opaque. The animal is dark leaden grey, some- 

 what paler at the sides of the foot." (Blanf.) 



"This is, I believe, only a more slender form of tenuispira, 

 as I have specimens intermediate in breadth ; as to any differ- 

 ence in the columella, some of my specimens of tenuispira 

 have the lower part more bent than in any of the supposed 

 baculina " (Beddome). 



596. Var. pertenuis ( Blanf ord). PI. 9, fig. 3. 



"Shell very slender, turrited, 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 y 5 the length of the spire. Aperture oblique, ovately 

 pyriform, peristome thin, margins united by a thin callus, 

 columella moderately curved, obliquely truncate. Length 20, 

 diam 4 1 /. Length of aperture 4 mm. (Blanf.) 



Tongoop, Arakan. (Blanf.) 



"Var major. Length 26i/> mm.; diam 6; length of aper- 

 ture 6. Of another specimen length 23 mm.; diam. 5%; 

 length of aperture S 1 ^. Pyenm Khyoung, Bassein district, 

 Pegu." (Blanf.) 



