CURVELLA, EAST AFRICA. 57 



growth-lines. Spire elongate-conic, obtuse at the apex. 

 Whorls 6 to 6*/2, a little convex, regularly, slowly increasing, 

 separated by a lightly oblique suture. Aperture ovate, acu- 

 minate above, about half the total length ; peristome thin, the 

 right margin prominently curved in the middle, deeply re- 

 ceding to the suture ; columellar margin oblique, broadly ex- 

 panded and reflexed. Alt. 12.5, diam. 6.5, aperture 6x3 mm. 

 (Smith). 



British Central Africa: Mt. Chiradzulu, Masuku plateau, 

 6,000-7,000 ft. ; Nyika range, 7,000 ft. 



Curvella nyasana SM., P. Z. S., 1899, p. 588, pi. 33, f. 44. 



"This species may prove to be the same as Hapalus conoi- 

 deus of Martens, but judging from the figures, it seems to be 

 longer and narrower with a more produced and less pointed 

 spire. " 



A variety from Zomba Plateau is "larger than the type, 

 wider, the spire shorter, the upper whorls shorter; length 

 18.5, diam. 11 mm." 



18. C. ASSOCIATA (E. A. Smith). PL 8, fig. 19. 



Shell elongate, narrow, scarcely perforated, glossy, whitish 

 or waxen. "Whorls 6, convex, slowly widening, sculptured 

 with strong, regular, close, subhorizontal, slightly curved 

 string; separated by a slightly oblique suture; the last whorl 

 small. Aperture small, about three-eighths the total length; 

 lip thin, lightly arcuate ; columella slightly twisted, expanded 

 and reflexed, joined to the outer lip by a thin callus. Length 

 7.5, diam. 3% mm.; aperture 3 mm. long, 1.5 wide (Smith). 



Mamboia, 4,000-5,000 ft. elevation (Rev. Last). 



Bulimus (Hapalus) associatus SMITH, Ann. Mag. N. H. 

 (6), vi, p. 157, pi. 5, f. 14 (Aug., 1890). 



"This species has the sculpture very like that of Hapalus 

 disparilis, but is quite distinct on account of its very differ- 

 ent form." 



19. C. WHYTEI Smith. PI. 9, fig. 47. 



Shell elongate, obtuse at the apex, imperforate, thin, pale 

 straw-colored, glossy, very delicately arcuately striated. 



