2 Descriptions of new species of Diplommatina. [No. 1, 



rather acute, suture slightly impressed below; whorls 7£, the 

 aute-penultiniate the largest ; penultimate whorl slightly constrict- 

 ed at I turn behind the peristome, last whorl ascending chiefly 

 behind the constriction ; aperture sub-vertical, broadly curiculate ; 

 peristome solid, double, columellar margin straight, right-angled 

 at base ; the usual tooth, large, coarse and blunt, sometimes 

 descending ; lips very slightly expanded, outer more so than the 

 inner, this last continuous, forming a strong callus upon the 

 penultimate whorl. 



Animal, pale, almost colourless, tentacles brown, labial ribbon 

 long and tapering. 



Height, 4 mm. ; diameter, 2 J mm. ; diameter of aperture, 1 mm. 



Habitat. — Hill at the junction of the Kayeng and Jatinga rivers. 

 N. Cachar Hills. 



This is a very handsome and peculiar species, and one of 

 the largest I have obtained in these hills ; it was only found 

 on the above isolated hill, where it was abundant. I have 

 named it after the large river, the Jatinga, that flows below. 

 The species is nearly allied to D. Blanfordiana and B. scmi- 

 sculpta : it is, however, somewhat more tumid, and has shallower 

 sutures than either of these forms ; and while it has not the 

 distant retro-relict peristome and rimation of the former, it ap- 

 pears to be less sharply angulated at the base of the peristome 

 than the latter. But the most distinctive character is the position 

 of the slight constriction of the penultimate whorl which, instead of 

 being in front of, or above, the aperture, as in B. Blanfordiana, B. 

 semisculpta and B. pachycheilus, is at a considerable distance, 

 about I turn behind it, (vide fig. la, pi. I). Hence the suture 

 of the last whorl rises rapidly behind the constriction, runs for a 

 short distance in front of it parallel with the preceding suture, and 

 finally again ascends to the margin of the peristome. 



2. Diplommatina depressa, n. sp. Pi. I., fig. 2. 



Shell dextral, not rimate, ovate, depressed ; colour light amber, 

 tinged rubescent at apex ; costulation throughout close but sharply 

 defined, more distant on body whorl ; spire conoidal, apex blunt ; 

 suture deeply impressed ; whorls 5, sides with considerable con- 



