156 ZONITID^E. 



Hob. Simla (Captain T. Huttori): 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.] 



[242. Syama promiscua, Godwin-Austen. 



Macrochlamys prona, Nev., Theobald, J. A. S. B. I, pt. 2, 1881,, 

 p. 46. 



Shell hardly perforate, subdiscoid, not very solid ; sculpture 

 quite smooth, lines 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. 11*0 ; alt. axis 4'5 mm. 



Hob. 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 6 whorls 

 measured 15 x 13-4 x 7'8 mm.] 



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



pi. 21, 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-set papillate dots ; 

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

 colour near the aperture, progress of growth 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. 



Hab. 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 . 10 . 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 



