CURVELLA, EAST AFRICA. 53 



less perforate or umbilicate, and are here arranged by size, 

 from larger to smaller, in the absence of data sufficient for 

 a natural grouping. 



11. C. SUBVIRIDESCENS (E. A. Smith). PI. 9, fig. 41. 



Shell imperforate, elongate, thin, glossy, subpellucid, pale 

 greenish. Whorls 7, slightly convex, sculptured with curved 

 growth-strise ; spire obtuse at the apex. Suture slightly ob- 

 lique, distinct; aperture inversely subauriform, five-thir- 

 teenths the length of the shell; lip very thin, projecting in 

 the middle, curved. Columella somewhat twisted, whitish, 

 slightly and delicately reflexed, joined to the outer lip by a 

 delicate callus. Length 14, diam. 5%, aperture 5 mm. long, 

 2i/ 2 wide (Smith). 



Mamboia, 4,000 to 5,000 ft. elevation (Last). 



Bulinnis (Hapalus) subviridescens SMITH, Ann. Mag. N. 

 H. (6), vi, p. 156, pi. 5, f. 12 (August, 1890). 



"This is a more slender species than Hapalus grateloupi 

 Pfr., the type of the group, has a somewhat shorter body 

 whorl, and a less distinct spiral curve on the columella. In 

 one of the specimens there are about half a dozen roundish 

 eggs, which are seen through the transparency of the shell, 

 as in many species of Stenogyra" (Smith). 



12. C. SINULABRIS (Martens). PI. 8, figs. 25, 26. 



Shell perforate, elongate, thin, sculptured with incised 

 arcuate strise, somewhat shining, pale yellowish ; apex obtuse. 

 Whorls 8, the first convex, following ones nearly flat, the last 

 whorl oblong, tapering at the base, perceptibly descending in 

 front. Aperture oblong, acutely angular above, narrowly 

 rounded below, the outer margin unexpanded, thin, arcuate, 

 sinuously receding at the insertion; colurnellar margin 

 dilated, reflexed, half covering the perforation. Length 18 

 to 18.5, diam. 6, aperture 6.5 to 7 mm. long, 3 wide (Martens). 



Kipopotue in TJkamba (Hildebrandt). 



Stenogyra (Opeas) sinuldbris MARTENS, Monatsberichte d. 

 Akad. d. Wissensch. in Berlin, 1878, p. 295, pi. 2, f. 3, 4.- 

 Hapalus s., MARTENS, Beschalte Weichthiere, p. 130. 



