GLESSULA. 407 



The shells on which Benson based his species must have been 

 immature, for I find specimens in the Beddome collection of 7^- 

 and 7| whorls ; the former measuring 27 X 13 mm. and the latter 

 27 X 12 mm. A box in the same collection contained four speci- 

 mens labelled " lankana=inornata," two of which pertain to the 

 present species, while one is inornata and the other parabilis \ 



384. Glessula sinhila, Preston. 



Glessula sinhila, Preston, Rec. Indian Mus. iii, 1909, p. 135, pi. 22, 

 fig. 14 ; Pilsbry, Man. Conch, ser. 2, xx, 1910, p. 320, pi. 43, 

 fig. 7. 



Original description : " Shell moderately thin, polished, dark 

 yellowish horn colour, obtusely lanceolate ; whorls 7-j, marked with 

 very faint lines of growth only ; sutures impressed ; columella 

 descending in a very oblique curve; peristome simple, bent 

 slightly inwards above ; aperture inversely, elongately auriform. 



" Alt. 21*75, diam. major 9 mm. ; aperture, alt. 7'75, diam. 

 4 mm." (Preston.) 



Bab. Ceylon (Preston). 



Mr. Preston compares the present species with G. inornata, Pfr., 

 from which, he says, it is easily distinguished by its much more 

 slender form. Judging from the figure it appears to me to be 

 much more nearly allied to G. serena, Benson. It has, however, 

 a less attenuated spire than the latter, and is a trifle more 

 cylindrical in shape. 



385. Glessula layardi, Pilsbry. 



Glessula layardi, Pilsbry, Man. Conch, ser. 2, xx, 1908, p. 59, pi. 7, 

 figs. 6, 7. 



Original description : " 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 

 the last whorl, and obsolete on the base. The summit is obtuse, 

 rounded, first whorls smooth. Whorls 6|, moderately convex. 

 Suture elegantly but somewhat irregularly denticulate. Aperture 

 vertical ; outer lip obtuse ; columella very short, moderately or 

 deeply concave, subhorizontally and very deeply truncate. 



" Length 14, diam. 6, leugth of aperture 5-9 mm. 



" Length 13*5, diam. 6-1, length of aperture 5'9 mm." 

 (Pilsbry.) 



Hob. Ceylon (Layard). 



" This species differs from G. ceylanica by its very much less 

 deeply concave columella. It is a smaller and more slender shell 

 than G. serena which seems to be its nearest ally. The denticu- 

 latiou of the suture is a prominent feature. Though * live ' shells, 



