MOLLTJSCA OF INDIA. 



157 



oblique ; peristome thin ; columellar margin oblique, with a very 

 slight reflection. 



Size : maj. diam. 12-0, alt. axis 4*5 mm. 



Among specimens of this shell, I noticed one which contained a 

 dried-up animal in good preservation. It was put to soak, and 

 after 15 days was examined, when the external characters were 

 remarkably well seen, even to the peripodial grooves and streaks on 

 side of the foot. It has a narrow tongue-like right shell-lobe and 

 a similar well-developed left shell-lobe. After further soaking in 

 water for 24 days, the araatorial organ was well seen and the jaw 

 secured ; the radula was broken up, but after a long search over 

 three glass slides which had been in use I found and mounted a 

 portion of it. The central teeth have a cusp on the outer side and 

 a small one on the inner apical margin. The admedian are all 

 short and straight-sided, not bicuspid, an unusual character. 



The shell-lobes are like those of Macroclilamys, and I place it in 

 that genus. I thought at first I had re-found in the Dafla Hills 

 Henry Blanford's Darjiling species, Helkarion ovatum, J. A. S. B. 

 1870, p. 312, of which the type appears to be lost ; but on looking 

 over his description again I see he compares ovatum with species of 

 the H.-salius type from .the shell-character. The shell oi this Dafla 

 species does not resemble H. salius, and the external character of 

 the animal is quite different. 



MACEOCHLAMrs RAZAMiENsis. (Plate CVIII. figs. 2, 2 a, 2 h.) 



Locality. Kopamedza Peak, Naga Hills (Godiv in- Austen). 



Shell globose ; umbilicus concealed, very thin and transparent, 

 glassy ; sculpture none ; colour pale sap-green ; spire subconoid ; 

 suture shallow ; whorls 5, very convex and rounded on the 

 periphery ; aperture ovate, nearly vertical ; peristome very thin ; 

 columellar margin oblique. 



Size : maj. diam. 10'25, alt. axis 4*75 mm. 



Animal. Shell-lobes present, but not well preserved in the soaked 

 specimen. Foot moderately large, gland seen ; olivaceous in colour ; 

 sole divided. 



Animal dark-coloured, the shell-lobes still darker. 



Jaw with a central projection. 



Radula has a formula : 



39 . 2 . 10 . 1 . 10 . 2 . 39 

 51 . 1 . 51. 



Centre tooth bicuspid; admedian teeth bicuspid ; laterals bicuspid, 

 becoming rapidly minute on tho margin. 



Mackochlamxs mahadeoensis, n. sp. (Plate CVIII. figs. 3, 

 3 a, 3 6.) 



Locality. Mahadeo Peak, Burrail Eange, near Asalu (Gochvin- 

 Austen). 



Shell depressedly globose, thin, not umbilicated ; sculpture 



