156 



ZONITIDjE. 



Hah. Simla {Captain T. Hutton): British Museum Natural 

 History. This shell was sent home by Capt. Hutton a long time 

 ago as H. petrosa, a name afterwards transferred to the species 

 found on the hills south of the Ganges. He also considered this 

 and the Mussoorie form the same.j 



[242. Syama promiscua, Godwin- Austen. 



Macrochlamys proua, Nev., Theobald, J. A. S. B. \, pt. 2, 1881, 

 p. 46. 



Shell hardly perforate, subdiscoid, not very solid ; sculpture 

 quite smooth, hues of growth not showing ; colour very pale 

 brown, a white band behind the aperture ; spire very low, only 

 just above the level of the last whorl, apex rounded; suture 

 shallow ; whorls 5|, regularly increasing, the last rounded on the 

 periphery ; aperture nearly vertical, broadly lunate ; peristome 

 thin, scarcely sinuate on basal margin ; columellar margin very 

 oblique, no reflexion. 



Size : major diam. 12-0, min. ll'O ; alt. axis 4*5 mm. 



Hah. Tundiani, near Murree. 



This shell may be distinguished from S. prona by its more 

 discoid form, small perforation, and smooth surface. The animal 

 is described by Theobald as " long and slender, and dark slaty 

 above with long tentacles." His largest specimen of (J whorls 

 measured 15 x 13*4 x 7*8 mm.] 



[243. Syama masuriensis, Godivin-Austen, Mol. Ind. i, 1883, p. 94, 

 pi. '2\, tig. 8 (sculpture on shell). 

 Macrochlamys prona, id. ib. p. 103, pi. 22, figs. 2,2 a (shell). 



Shell very closely umbilicated, discoidal, base flat ; sculpture 

 linear-longitudinal, each line formed by close-sefc papillate dots ; 

 colour pale sienna-brown, a darker conspicuous baud of same 

 colour near the aperture, progress of growtli is shown by the 

 ochraceous bands behind it at intervals ; spire very depressed, 

 apex very flattened ; suture adpressed ; whorls 6, regularly in- 

 creasing, sides flat above, rounded on the last ; aperture lunate, 

 subvertical ; peristome thin, straight, scarcely reflected and very 

 obliquely descending on the columellar margin. 



Size : major diam. 18'2, alt. axis 7'0 mm. 



Hah. Mussoorie, N.W. Himalaya. 



Animal (of the Mussoorie form) very black and long, a very 

 sharp-pointed lobe over the mucous gland. Mantle slightly 

 reflected over the margin of the peristome, with two right and 

 left tongue-shaped expansions, which the animal expands and 

 contracts. Animal of specimen from Paurhi in Garhwal also 

 black. Teeth of radula 30 . 2 . 10 . 1 . lU . 2 . 30 (or 42 . 1 . 42). 

 Admedian teeth long, with a cusp on the outer side; the laterals 

 bicuspid, inner point the longest ; the ten or twelve outermost 



