136 Contributions to Indian Malacology. [No. 2, 



ruptd sub-peripherid alidaue lata in umbilico castaneis. Spirafere 

 plana ; apice prominulo papillari ; sutura valde impressa. Anfr. 5 

 rotundati ; ultimus teres, antice sensim descendois, spiraculo brevi 

 sub-verticali truncate-conico, cum anfractu penultimo conjuncto, 4 

 mill, pone aperturamsito munitus. Apertura diagonalis, circularis ; 

 peristoma duplex ; internum breviter porrectum obtusum, ad suturam 

 angulatim sinuatum ; externum continuum expansum, supra sinum 

 instar alee cuculliformis , anfractui penultimo appressce exstans, versus 

 basin columella processum linguiformem emittens. Operculum corneum, 

 intus valde concavum, extus convexum, apice planulato, marginibus 

 anfractuum lanielliferis. Diam. maj. 14^, min. 11-^, axis 6, ap. 

 diam. intus 4 mill. 



Hab. In montibus Pulney dictis, India? meridionalis. S. Fairbanh. 



Shell broadly umbilicated, depressed, nearly discoidal, greyish 

 white with irregular streaks and spots of chesnut and two bands of 

 the same colour ; one, somewhat interrupted, below the periphery, the 

 other, broader, within the umbilicus. Spire almost flat, the apex 

 prominent and papillar, the suture deeply impressed. Whorls 5 

 rounded, the last cylindrical, gradually descending in front and fur- 

 nished, (0.16 inch behind the aperture), with a short nearly vertical 

 spiracle, in the form of a truncated cone, and joined to the penulti- 

 mate whorl. Aperture diagonal, circular, the peristome double, the 

 internal portion projecting slightly and obtuse, with a rather shallow 

 angular sinus near the suture : the external peristome is continuous, 

 expanded, dilated above into a projecting wing which runs forwards 

 for some distance along the last whorl in front of the aperture, and is 

 bent downwards at the end. Near the base of the columellar margin 

 there is a small gutter-shaped projection. The operculum is very 

 concave within, externally convex, flattened at the apex, with free 

 lamellar edges to the whorls as in the typical species of Pterocyclos. 

 Major diameter 0.58, minor 0.47, axis 0.23, diameter of the aperture 

 within 0.16 inch. A rather smaller specimen measures 0.64 by 0.52 

 in its two diameters. 



This species has not been figured as I hope to be able to give illus- 

 trations of all the known forms of Spiraculum on one plate. 



The genus Spiraculum, previously to Mr. Fairbank's discovery, 

 was not known to occur in Southern India. Its detection serves to 



