68 ZONITID^E. 



102. Euplecta isabellina, Pfr. (Helix) P. Z. S. 1854, pi. 52 ; id. Mon. 



Hel iv, 1859, p. 66 ; H. $ T. (Helix) C. I. 1876, pi. 27, fig. 7. 

 Helix Isabella, H. 8f T. C. 1. 1876, p. viii ; Nev. (Nanina) Hand-l i, 

 1878, p. 29. 



Shell perforate, depressed, sublenticular, thin, horny, translucent, 

 straw-coloured to isabelline, striated, the striae interrupted by 

 impressed lines leaving elongate granules, which form subdis- 

 tant spiral bands ; spire convex, its height forming less than 

 half the axis, apex distinct, suture linear, not impressed. Whorls 

 5-5|, increasing regularly, flattened above, the last broader than 

 in most allied forms, sharply keeled, not descending, swollen 

 beneath ; aperture oblique, angularly lunate, subrhomboidal ; 

 peristome thin, basal margin regularly curved, columellar margin 

 almost vertical above, briefly and broadly reflexed. 



Major diam. 33, min. 27, axis 15 mm. 



Hob. Hills of South-western Ceylon. 



103. Euplecta colletti, Sykes, Pi-oc. Mai. Soc. ii, 1897, p. 234. pi. 16, 



figs. 5, 6. 



Smaller than E. isabelhna, but closely allied to it. The whorls, 

 4| to 5 in number, increase more slowly, and the last whorl is 

 proportionally narrower ; the spiral sculpture so conspicuous on 

 E. isabellina is almost obsolete or replaced by fine close spiral 

 lines of granules, and the protoconch is smooth. Colour tawny. 



Major diam. 21, mm. 17 j, axis 8| mm. 



Hob. Watawala, Ceylon (Collett). 



This may be immature, and may be a variety of E. isabellina, 

 but it is sufficiently distinct to require recognition. 



E. Trochiform. 

 a. Sculpture granular. 



104. Euplecta cacuminifera, Bs. (Helix) A. M. N. H. (2) v, 1850, 

 p. 214 ; Pfr. Mon. Hel iii, 1853, p. 36 ; iv, 1859 ; vii, 1876, 

 p. 103 ; H. Sf T. C. 1. 1876, pi. 54, fig. 2. 



Shell obtectly perforate, trochiform, thin, horny, with fine 

 granular sculpture above, arranged on the oblique striae of growth 

 in spiral longitudinal series, varying slightly and somewhat 

 irregularly in size, some series or parts of series of granules being 

 larger than others ; spire conoidal with concave sides, apex 

 attenuate ; whorls 8, slowly increasing, flat above, the last acutely 

 keeled, compressed below the keel, convex beneath, smooth, 

 polished and radiately striated ; aperture scarcely oblique, sharply 

 angulate at the periphery ; peristome thin, columellar margin 

 oblique, triangularly reflected above, partly covering the perforation. 



Major diam. 18, min. 16, axis 13 mm. 



Hab. Nilgiri Hills, S. India (Jerdon); Sispara (W. T. B.). 



This shell is easily recognized by its sculpture. 



