139 



NOTES ON THE GENUS SESARA, ALB., WITH 

 DESCRIPTIONS OF TWO NEW FORMS. 



By G. K. GUDE, F.Z.S., 

 London. 



Sesara hapmeri, n. sp. Figs, i, 2. 



»SAeZZsubperforate, conical, thin, pellucid, pale corneous, finely striulate, 

 decussated by microsco]jic spiral lines. Spire conoidal ; suture 

 linear, margined ; apex obtuse. Whorls 7, increasing slowly, slightly 

 convex, with an acute, compressed keel ; the last whorl descending 

 very shortly in front; base flattened, a little tumid towards the 

 umbilicus. Aperture oblique, trapezoid. Peristome white, margins 

 distant ; right margin a little expanded ; basal margin slightly 

 thickened, horizontal ; columellar margin shortly reflected over the 

 narrow perforation of the umbilicus. Within the aperture are two 

 teeth, one on the columellar margin, conical ; the other on the basal 

 margin, curved, triangular, its apex curved towards the uuddlicus. 



Diam. maj. 675, min. 625, alt. 5 mm. Eight specimens. 



Hah. — Khasi Hills, Assam. Tijpe in my collection. 



I. 2. 3. 4- 



Figs. I and 2. — Scsura harmcri, n. sp. 

 Figs. 3 and 4. — Sesara diplodon, Benson. 



From Sesara dipJodon, its nearest ally, this new species differs in 

 the more elevated spire, the more flattened base, and the narrower 

 perforation of the umbilicus. In S. diplodon the base near the mouth 

 slopes more decidedly towards the umbilicus, and the elongated 

 scrobiculation behind the mouth, so conspicuous in that species, is 

 absent in S. liarmeri. The basal tooth, moreover, is simple, while in 

 S. diplodon it is double and sinuate, the anterior tooth in S. diplodon 



