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



circular with, slight obliquity, columellar margin rounded, the 

 usual tooth absent ; peristome strong, well developed, double, both 

 outer and inner lips expanded, the former to the greatest extent, 

 the latter forming a thick parietal callus. 



Height, 0.065 inch, (1^-mm.); thickness, 0.035, (1 mm.) 

 Habitat. — Moyongon north face of Khasi hills, not very plentiful. 

 This shell was found during the field Season 1866-67, and I am 

 sorry that owing to some oversight it was not included among the 

 Diplommatince sent to Mr. W. T. Blanford, whose description 

 would have been so much more perfect. I have retained the name 

 parvula, being the one selected by him, on inspection of a drawing 

 of the shell. 



7. Diplommatina insignis, n. sp. PL II, fig. l. 



Shell sinistral, acuminateiy oval, colour corneous or pink, costula- 

 tion close and strong on the upper whorls, obsolete on the two 

 last ; spire rather pointed. Whorls 8, lower rounded, at apex 

 flat-sided ; penultimate the largest, the constriction of this last 

 situated in front and covered by the parietal callus ; suture im- 

 pressed, aperture vertical, oval ; peristome double, outer much 

 thickened, inner continuous, callus strong ; columellar margin round. 

 ed, the tooth-like process moderate. 



Operculum, thin, spiral, no boss at the back. Animal pale 

 colored, tentacles, black, rostrum pink ; the body spotted with 

 black which shews through the shell in fresh specimens. 



Height 0.27 inch. ; diam. 0.13 inch. ; diam. of ap. with peristome 

 0.10 inch. 



Habitat.. — In the forests of Burrail range, at about 3000 feet, Asalu, 

 particularly the forest near Grarilo or Chota Asalu. 



This fine sinistral form is up to the present time the largest known 

 species from India, It is a well marked shell, and differs widely 

 from the other sinistral species from these hills, three of which are 

 now known, D. gibbosaW* Blanf., D. Jaintiaca, Grod.-Aust. 

 and the above, 



8. Diplommatina tumida, u. sp. Pi. II, fig. 2. 



Shell dextral, ovately and tumidly fusiform, color pale corneous, 

 or pale green ; costulation fine and close throughout ; spire attenuate, 



