302 



DESCRIPTIOXS OF SIX NEW SPECIES OF LAND SHELLS FROM 

 SOUTH AFRICA. 



By Henry C. Burnup. 



Read Uth April, 1905. 

 PLATE XVI. 



In 1897 Messrs. Melvill & Ponsonby described the first Curvella 

 found in South Africa under the name Hapalus cataradce} Since that 

 date the same authors have differentiated three other species — glohosa,"^ 

 simtosa,^ and caloglypta} In the present paper descriptions of four 

 species of Curvella, one of Ena, and one of Obeliscus are given. 



I am indebted to Mr. Ponsonby for kindly entrusting me with such 

 of the specimens as were sent to him for determination, and for 

 assisting me in their diagnosis. 



Ena (Pachnodus) McBeaniana, n.sp. PI. XVI, Figs. 1, 2. 



Shell pyramidal, horn-coloured, opaque, deeply and rather widely 

 nmbilicate, thin, shining ; with 6J whorls, rather ventricose, becoming 

 flatter towards the apex, impressed at the sutures, all clearly, finely, 

 obliquely striate, except the first 2\, which are smooth ; body-whorl 

 half the length of the shell ; aperture nearly round, slightly oblique, 

 with thin simple peristome, the columella margin of which is thickened 

 and triangularly reflexed over the umbilicus, which it partly hides ; 

 columella, and thin callus connecting the extremities of the peristome, 

 pale, growing whitish in places. 



Long. 15, lat. 12'5 mm. 



Hab. — Pretoria, Transvaal (J. McBean). Sevei'al specimens. 



The absence of a keel on the peripliery will easily distinguish this 

 species from some of its nearest allies ; and the obliquity of its aperture, 

 unaccompanied by any expansion of the labrum, will as readily 

 prevent its being confounded with others. The tendency of the 

 epidermis to peel off in patches is unusual in the group, as is also the 

 opaque, light brownish gray shell exposed in those patches, most of its 

 allies having semitranslucent shells. 



Curvella Croslti, n.sp. PI. XVI, Pigs. 3, 4. 



Shell imperforate, fusiform, white, thin, shining ; with 6 whorls, 

 the last 3 being more ventricose than the others, slightly impressed at 

 the sutures, irregularly ornamented with curved, transverse stria?, 

 which are crossed by a great number of regular, microscopic, spiral 

 striae, the last whorl being less than the spire ; aperture ovate ; labrum 

 thin, simple, well arched forward in the middle, labium thickened and 

 thrown back, quite covering and closing the umbilicus ; columella 

 slightly curved obliquely to the left ; callus scar extending from the 



' Ann. Nat. Hist., vol. xix (1897), p. 635, pi. xvii, fig. 4. 



2 Ibid., vol. ii (1898), p. 128, pi. vii, fig. 6. 



3 Il.id., vol. iv (1899), p. 198, pi. iii, fig. 12. 



■» Ibid., vol. viii (1901), p. 320, pi. ii, fig. 12. 



