CURVELLA, WEST AFRICA. 49 



xxii, afd. iv, no. 2, p. 60, pi. 5, f. 5, 1896. Not C. sulcata 

 diaper. 



This species seems to be very closely related to C. sulcata 

 Chaper; but that shell, while larger, is said to have but five 

 whorls. The columella is twisted more than in C. decepta 

 Rve. 



3. C. REDFIELDI Pilsbry, n. sp. PI. 7, figs. 6, 7. 



Shell imperforate, turrited, slender, the diameter contained 

 21/2 to 3 times in the length, thin, subtranslucent, yellow or 

 corneous-yellow, glossy. Surface sculptured with fine, irreg- 

 ular growth-wrinkles only, without impressed grooves, the 

 wrinkles moderately arched forward in the middle, retracted 

 above and below. Whorls 7, moderately convex. Aperture 

 decidedly less than half the length of the she'll, irregularly 

 ovate. Outer lip thin, acute, moderately arched forward; 

 columella rather thick, sinuous, the reflexed columellar margin 

 completely appressed in adult shells. 



Length 10.7, diam. 3.5, aperture 4 mm. (type). 



Length 11, diam. 4, aperture 4.3 mm. (widest specimen). 



Length 8, diam. 3.3, aperture 3.7 mm. (immature shell with 

 6 whorls. 



Liberia, with Subulina angustior, etc. ( J. H. Redfield) ; 

 Cape Palmas (A. N. S. coll.). Types no. 58202 A. N. S. P. 



A series of ten specimens is before me, most of them 8 mm. 

 long, with 6 whorls, and having a very small perforation be- 

 low the columellar reflection, which is appressed except close 

 to the columellar lip. I take this to be a sign of immatur- 

 ity, although most of the specimens contained eggs. In two 

 specimens of more than 10 mm. length the axis is wholly 

 closed. C. decepta is a wider, more conic shell, with the colu- 

 mella more twisted. C. inornata differs by its straight colu- 

 mella; while C. sulcata and daillyana are more strongly 

 sculptured shells with the aperture larger, half the shell's 

 length. The globular, dirty white, calcareous eggs are 1 mm. 

 in diameter. 



4. C. DECEPTA (Reeve). PI. 7, fig. 10, 11. 



"Shell somewhat fusiformly conical, whorls seven in num- 



