304 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



CUKVELLA ELEVATA, n.Sp. PL XVI, FigS. 10, 11. 



Shell elongate - conic, umbilicate, pale ashy straw- colour, thin, 

 shining, translucent ; with 6 slightly ventricose whorls, not much 

 impressed at the sutures, the apes being blunt, and the last whorl 

 2-5 mm. of the length of the shell, very finely, irregularly sculptured 

 with curved, transverse striae, with traces of microscopic spiral lines ; 

 aperture oval, small ; labrum thin, simple ; labium triangularly reflexed 

 over the umbilicus ; columella paler, nearly straight, slightly bent to 

 the left. 



Long. 6'5, lat. 3 mm. 



Sab. — Grahamstown, Cape Colony (J. Farquhar). 



Broader at the periphery, which is situate lower on the body-whorl, 

 and with straighter sides, and therefore of more pyramidal outline, 

 this shell is more elegant in form than either of the preceding allied 

 species, C. straminea and C. succinea, from which it is easily dis- 

 tinguished. 



Obeliscus Natalensis, n.sp. PI. XVI, Fig. 9. 



Shell elongate, attenuate above, very narrowly umbilicate, thin, 

 yellowish white, shining, subtranslucent ; with 9^ rather ventricose 

 whorls, the last being one-third of the whole length of the shell, and 

 all, except the first two apical whorls, being ornamented with close, 

 fine, shai'p, cun-ed. transverse liras, the apical whorls being smooth, 

 and the apex itself obtuse ; aperture ovate ; outer lip very thin, 

 simple, arched forward rather above the middle, and receding towards 

 the base ; inner lip rolled closely back over the columella, which is 

 arcuate. 



Long. 21'5, lat. 6"75 mm. 



ffab. — Umbogintwini, near Durban, Natal (Burntip). 



The close lirate sculpture, which gives the whole shell a soft, silky 

 appearance, readily distinguishes this species from 0. lanceolatus (Pfr.), 

 which is the nearest South African ally known. In the type, the 

 exceedingly thin labrum is slightly broken away at the base, for which 

 due allowance has been made in the measurements given. On the 

 parietal wall the sculpture is almost obliterated by the beginning of 

 the formation of a callus. A second example of this shell, found at 

 Table Mountain (Natal), at a distance of about .50 miles from 

 Umbogintwini, and at an altitude of fully 2,000 feet above the sea 

 (while the last-named locality is little above sea-level), has the callus, 

 which is almost pure white, in a more advanced state of development, 

 and the labium more triangularly reflexed, and is 23 mm. long by 

 7 mm. broad. It also has the thin labrum slightly damaged. 



EXPLANATION OF PLATE XYI. 



Figs. 1, 2. Ena {Pachnodus) McBeaniana, u.sp. 



,, 3, 4. Curvella Croslyi, n.sp. 



,, 5, 6. Curvella straminea, u.sp. 



,, 7, 8. Curvella succinea, n.sp. 

 Fig. 9. Obeliscus Natalensis, n.sp. 

 Figs. 10, 11. Curvella elevata, n.sp. 



