244 ZOUITIDJG. 



to the outer than to the inner. In the variety tickelli the middle 

 and outer teeth are close together and united at the base ; this 

 form is also rather small and sharply keeled. In capessens, which 

 is also keeled and somewhat depressed (Benson's three measure- 

 ments are 9, 8, and 4 mm.), the teeth are equidistant. 



367. Sesara hungerfordiana, Theobald, J. A. S. B. 1876, p. 184, 

 pi. 14, fig. 1. 



Shell imperforate, depressed, sublenticular, pale yellowish 

 horny, finely, closely, and costulately striated above, the ribbing 

 passing over the keel and disappearing on the lower surface, the 

 interior portion of which is smooth and polished; spire low, suture 

 scarcely impressed ; whorls 6, flattened above, slowly increasing, 

 the last descending for about one-third of its course, sharply and 

 compressedly keeled, moderately convex beneath, excavated in the 

 middle, the keel finely serrated ; aperture very slightly oblique, 

 elongate, margins diverging, joined by a callus ; peristome thick- 

 ened inside, the basal margin arcuate and bearing three subequal 

 and equidistant teeth, the two outer united by a low lamella, 

 the thickening inside the upper and columellar margins also 

 lamelliform. 



Major diam. 11|, min. 11, axis 5 mm. 



Hab. Mizantoung on the Salwin, near Moulrnein. 



Distinguished by its lenticular form, sharp keel, and descending 

 last whorl. 



b'. Palatal teetli 2. 



368. Sesara ataranensis, Theobald (Nanina), J. A. S. B. 1870, p. 401, 

 pi. 17, fig. 7 ; Pfr. Mon. Hel vii, 1876, p. 578 ; H. $ T. C. I. 



1876, pi. 84, figs. 5, 6. 



Shell imperforate, lenticular, pale chestnut or tawny, costulately 

 striated above, the striation conspicuously more distant on the 

 outer whorls, closer on the inner, and wanting on the innermost ; 

 spire convexly conoid, suture not impressed ; whorls 7, almost flat 

 above, the last with a compressed keel, moderately convex beneath, 

 the costulate striation passing below the keel and disappearing 

 gradually on the lower surface, which towards the middle is 

 excavated and polished; aperture nearly vertical, angulate ex- 

 ternally, narrow and contracted by lamellae, one in the upper 

 margin increasing in height externally and joining by its base a 

 second, large and almost semicircular, concave in front, which 

 occupied half the basal margin, a third smaller and re-entering, 

 nearer the columellar area ; peristome white, thickened inside, 

 basal margin arcuate. 



Major diam. 9, min. 8J, axis 4 mm. 



Hab. Banks of Ataran River, not far from Moulmein. 



Distinguished from S. infrendens by finer sculpture, a sharp keel, 

 and very different dentition. 



