the South- African Stenogyritioe. 271 



11. Curvella modesla, s[ . n. (PI. Vf. fl<;. 1').) 



SIk'11 small, c<»nic-ovate, riUlici- subulate, riinut', pale 

 olivaceous, tliiu, glossy, almost transparent. Spire proihico'l, 

 acute, evenly tiipering, apex rounded. Whorls 5^, re^Mihuly 

 and rather rapidly increasing in distance between sutures, 

 rather convex, covered, after ihe first 1^, with fine, regular, 

 curved atrix', which are almost invisible without a strong Icih. 

 Suture well detiui'd, of moderate dcl)th. Aperture ovate, 

 rounded at base. Peristome sim[)le, acute. Outer lip some- 

 what curved outwards and slightly arched forward. Columella 

 very slightly concave, margin narrowly reflexed. 



Shell 6*8 X 28, aperture 2"5 x I"2, last whorl i mm. 



JIah. Cape Colony, Dassie Crantz, Grahumstown ; Cra- 

 dock Commonage [Furquhar) . 



A ditlicult little species, recalling both C. elevata and 

 C. stratninea, Buriiup. From the latter it differs chietly in 

 colour, being pale olivaceous instead of stramineous, while it 

 is a rather more slender form than C. elevata. 



Genus IIypolysia, Melv. & Puns., I'JOl. 

 (Aun. & Mag. Nat. Hist. viii. 1001, p. 318.) 



A slender form, distinct from Opeas through its projecting 

 evolute outer lip. 



1. Ilyiiolynia Jlorenti(p^ Melv. & Pons. 



1901. Jlypolysiaforentia;, M. & V. Ann. & Mag. Nat. IlLst. viii. p. 318, 



pi. ii. fit;. 8. 

 ItKW. Hypolysiajlorentuc, M. A 1*. Ann. & xMag. Nat. Hist. xii. p. 590, 



pi. xxxii. fig. 13. 

 1900. Ili/polysiajlorentice, M. i^ P., Pilsb. Man. of Conch, xviii. p. 37, 



pi. X. figs. 06, 67. 



IJah. "Widely distributed through Natal, Zululand, and 

 the Eastern Province of Caj^e Colony. 



A very finely striate, tran.^parent, narrowly rimate shell, 

 generally somewhat fusiform in contour, with distinctly 

 filiform suture. 



This species is unusually subject to dimorphism, some 

 specimens from Eshowe being neaily double the width of the 

 type, though otherwise agreeing with it in all respects. 



Owing to the sculj)ture following the |)eculiar curve of the 

 outer lip, it is not difiicult to distinguish Hjpolysia even if 

 the evolute lip itself is biokrn. 



