62 ZONITID^. 



convex beneath ; aperture oblique, angularly lunate ; peristome 

 tbiu, upper margin arcuate, basal margin, seen from beneath, 

 straight or slightly convex, columellar oblique, briefly reflexed 

 above. 



Major diam. 16|, min. 15, axis 9 mm. 



Hah. Hills of South-western Ceylon, Matelle (Layarcl), Bala- 

 piti {Nevill), Ambagamua (CoUett), JN'ewara Ellia (F. Laynrd). 



This is the Ceylon representative of E. indica, and, like that 

 shell, varies in sculpture, in the sharpness of the keel, and in the 

 height of the spire. As a rule, the present form is smaller and 

 more closely wound than E. indica, and it appears to be constantly 

 distinguished by the peristome, the basal margin of which, viewed 

 from beneath, is always concave in E. indica, straight or even 

 faintly convex in adults of E. emiliana. 



91. Euplecta Isevis, Blf. Proc Mai. Soc. iv, 1901, p. 257, pi. 25, fig. 8. 



Sliell obtectly perforate, depressedly turbinate, carinate, almost 

 lenticular, whitish horny, translucent, the basal surface marked 

 with fine, close, concentric, opaque white lines, smooth, minutely 

 decussately striated above, radially striated beneath ; spire conoid, 

 suture impressed ; whorls 6, convex above, the last sharply 

 keeled at the periphery, convex below : aperture slightly oblique, 

 angularly lunate ; peristome thin, columellar margin vertical 

 above, briefly triangularly reflexed, partly covering the perforation. 



Major diam. 17, min. 15, axis 9i mm. 



Hah. Ceylon {Yerhury). 



This shell is related to E. emiliana, but is more sharply keeled, 

 and differs in its smooth upper surface and in the milky con- 

 centric lines on the base. 



92. Euplecta Ijinoyaensis, Godicin-Avsten, Mol. Ind. ii, 1899, p. 103, 



pi. 97, figs. 1-1 d (shell and anatomy) ; Blf. Proc. Mai. Soc. iv, 

 1901, p. 250, pi. 25, fig. 7. 



Shell perforate, depressedly turbinate, cai-iuate, fulvous horny, 

 with the keel whitish, rather thin, finely, closely, and arcuately 

 costulate above, the ribs bearing fine granules close together and 

 arranged in spiral lines ; spire conoid ; whorls 5, convex above, 

 slowly and regularly increasing, the last with a raised prominent 

 keel, considerably swollen below the keel, smooth and radiately 

 striated ; aperture oblique, roundly lunate, angulate at the peri- 

 phery ; peristome simple, columellar margin oblique, slightly 

 reflexed at the perforation. 



[Generative organs as in the genus. The muscular caecum 

 (crjJ.) is short. In this specimen a spermatophore in process of 

 formation was seen and is noticeable as quite unlike those of the 

 Macrochlamina) (fig. 30 C, p. 52). It consists of a large elongate 

 conoid mass set on one side with minute spines at tlie base, these 

 becoming in succession larger above ; where the vas deferens 



