GLESSULA, CEYLON. 59 



grooves, close on the spire but rather widely, unevenly spaced 

 on the last two whorls ; no perceptible spiral lines ; two 

 whorls at the summit smooth. Aperture small, the outer lip 

 rather thick ; columella moderately concave, sub vertically and 

 not very deeply truncate at the base. 



Length 8.5 to 8.8, diam. 3.2, aperture 3 mm. ; whorls 6!/2- 



Ceylon: Kandookerre (E. L. Layard). 



This form was distributed by Layard as pachycheilus Bens. 

 That species has not been figured, but according to the de- 

 scription it differs from this in several respects. G. colletta 

 is a more slender, darker species, with a. less thickened lip. 



9. G. SERENA (Benson). PI. 6, fig. 9. 



Shell ovate-pyramidal, rather solid, very highly polished, 

 slightly, obsoletely striate, tawny corneous, pellucid. Spire 

 elongate, subturrite, the apex abruptly obtuse ; suture im- 

 pressed, submarginate, crenulate. Whorls 6% to 7, subcon- 

 vex, convex above near the suture, the last whorl slightly 

 compressed at the base. Aperture vertical, three-sevenths the 

 total length, subtriangular-ovate; peristome unexpanded, 

 rather obtuse; columellar margin very deeply arcuate, whit- 

 ish-calloused, at the base abruptly and obliquely truncate. 

 Length 20 to 21, diam. 9 to 9.5, aperture 9 x 5.5 mm. (Bens.) 



Ceylon : Akurambodie, in southern Matelle. 



Achatina serena BENS., Ann. and Mag. N. H. (3), v, May, 

 1860, p. 384. PFR,, Monogr. vi, 223. H. & T., Conch. Ind. 

 pi. 78, 1 8. 



This species is very close to G. nitens, but the whorls are 

 less convex. It is doubtfully distinct from G. ceylanica, but 

 from the figures, that seems to be more straightly conic and 

 smaller. 



10. G. LAYARDI Pilsbry, n. sp. PI. 7, figs. 6, 7. 



The shell is oblong-turrite, yellow-corneous with profusely 

 scattered whitish dots and spots (produced by disintegration 

 of the surface), paler towards the summit. Surface very 

 glossy, without noticeable microscopic sculpture, but marked 

 with unevenly spaced grooves, which are rather weaker on 



