CURVELLA, SOUTH AFRICA. 59 



1.33 mm. Ongenya, west of the Semliki river, in the forest 

 region, in mould of a banana plantation. 



South African Species. 



21. C. CALOGLYPTA Melvill & Ponsonby. PI. 8, fig. 22. 

 Shell ovate, subrimate, thin, subpellucid. Whorls 5, in- 

 cluding the depressed, minute, apical one, all impressed at 

 the suture, gradate-ventricose, longitudinally very closely 

 and obliquely lirate throughout. Last whorl much larger 

 than the preceding. Aperture ovate; peristome thin, the 

 columellar margin a little thickened, triangularly reflexed. 

 Length 4.5, diam. 3 mm. (M. & P.). 



Otto's Bluff, near Pietermaritzburg, Natal (Burnup). 



Curvella caloglypta M. & P*, Ann. and Mag. N. H. (7), 

 viii, p. 320, pi. 2, f. 12. 



"From the three Curvellcz hitherto found in the South 

 African region, C. catarractce, sinuosa, 'and globosa M. & P., 

 this most delicate species differs in the more quadrate whorls, 

 compressed sutures, and especially in the close and regular 

 oblique longitudinal liration, which needs, of course, a lens 

 to bring out its beauty. It has only hitherto been found in 

 very small quantity " (Melvill & Ponsonby). 



22. C. CATARRACT^ (Melvill & Ponsonby). PI. 8, fig. 23. 

 Shell ovate-fusiform, translucent, very thin, smooth, very 



pale corneous-olivaceous. Whorls 5, the apical one obtuse, 

 the last rapidly increasing, a little inflated, immaculate. 

 Aperture small, ovate ; outer lip thin, simple ; columella 

 rather straight, triangularly reflexed over the umbilical re- 

 gion. Length 4.5, diam. 2.5 mm. (M. <& P.). 



Howick, a waterfall near Pietermaritzburg, Natal. 



Hapalus catarractce M. & P., Ann. & Mag. N. H. (6), xix, 

 p. 635, pi. 17, f. 4. 



23. C. CROSLYI Burnup. PL 8, figs. 27, 28. 



"Shell imperf orate, fusiform, white, thin, shining; with 6 

 whorls, the last three being more ventricose than the others, 

 slightly impressed at the sutures, irregularly ornamented with 



