MOLLPSOA OF INDIA. 27 



Glessula dikrangense, n. sp. No. 3404 B.'M. (Plate CLX. 

 fig. 7 (I.) 



Locahti/. Toniputu Peak, Ditlla Hill.s {Godwin- Austen). 



Shell oblon^^l}' turreted; sculpture rather strong striation, close 

 and regular; colour dull umber-hrown ; spire higli, apex blunt, 

 side straight ; suture irajiressed ; whorls 8, side nearly Hat, spire to 

 last whorl lU0:r)2'2; aperture oval; columellar margin slightly 

 convex. 



Size: maj. diam. 7"0 ; length 17'2o mm. 



" DiKRANGiA," genus nov. 



Shell verj' elongate, small, transparent, delicate, turreted with 

 many whorls closely wound and nearly ecjual in diameter, aperture 

 very small, ovate ; animal not known. 



GlESSULA (" DiKRANGIA ") NEVILLI, G.-A. 



When describing the Helicida; of the Dafla Hills (J. A. S. B. 

 1876, vol. xlv. pt. 2, pi. viii. f. 12, p. 315) I put this species into 

 the genus Opeas. This determination has been followed by 

 Mr. G. K. Gude in the ' Fauna British India, Mollusca,' vol. ii. 

 1914, p. 360. Closer attention shows the aperture to be decidedly 

 that of a Glessula, but the general form departs much from that 

 genus — so much so, it might ■syell be placed in a distinct sub- 

 section. This would be better left to be done when the anatomy 

 of the animal is known to us. I think it better to consider it a 

 new subgenus, and name it " Dih-anr/ia," coming after G. baculina 

 and G. //(troense. 



'I'he original description, which is as follows, was short and 

 requires amendment — it was not drawn up on one-type shells, but 

 on a set — niten done in those early days. 



Oriijiiial description: — "Shell turreted, very elongate, pale, silky 

 with a ijreen tituje, older specimens of a pale straw-colour, covered 

 with a thin ejiidermis, beautifully striate under lens. Whorls 11-12, 

 modenitely rounded and very gradually diminishing in size to the 

 apex, which is bluish ; suture impressed ; aperture angular above, 

 outer lip thin. 



"Alt. (.)-5.5" ; major diam. O'lO". Largest specimens 0-90". 



" Hahitat. This very delicate elongate shell was common on 

 Toruputu Peak, but far finer specimens, equal in size to the figure, 

 were obtained on the banks of the Pichola Nulla out iu the plains. 

 I am not satisfied with this figure, the whorls being rather too 

 flat and the apex too sliarp. 



" I have named this shell after my friend 5Ir. G. Nevill, with 

 whom I have now so long been associated in the study and 

 collection ot Indian land-shells." 



