50 CURVELLA, WEST AFRICA. 



ber, smooth, shining, obscurely concentrically striated from 

 the sutures, eolumella tortuous, receding, callous at the edge, 

 aperture oblong, lip simple; greenish- glassy, transparent" 

 (Eve.). 



Length 11, diam. 4.5, aperture 5x2.25 mm. (P/r.). 



Liberia: Cape Palmas, 



Bulimus interstinctus Gld., PFB., Monogr., ii, 1848, p. 169 

 (not of Gould). Bulimus deceptus EEEVE, Conch. Icon., v, 

 pi. 68, f. 488 (May, 1849). PFR., Monogr., iii, p. 435. 



It is related to C. guineensis, but differs by the shorter 

 last whorl, not tapering base, more twisted columella, etc. It 

 is imperforate, while guineensis is described as rimate. 



Specimens are before me from Cape Palmas, Liberia, one 

 being figured, pi. 7, fig. 11. The spire is straightly conic, 

 apex obtuse, whorls 6y 2 . The glossy surface is sculptured 

 with close but weak growth-wrinkles, which arch forwards in 

 the middle and are moderately retracted above and below. 

 The columella is thick, cord-like, and strongly twisted, imper- 

 forate. Length 11, diam. 4.7, length of aperture 5 mm. 



5. C. LIBERIANA Pilsbry, n. sp. PL 7, figs. 12, 13. 



Shell imperforate, ovate-turrited, thin, glossy, translucent, 

 yellow. Surface sculptured with rather wide-spaced, for- 

 wardly-arcuate grooves, which on the last half whorl become 

 much more numerous and closer. Between the grooves there 

 are slight growth-wrinkles. The spire is straightly conic, 

 apex obtuse. Whorls 5%, convex. Aperture narrow, half 

 the length of the shell, the outer lip moderately arched for- 

 wards. Columella subvertical, nearly straight, thick, ab- 

 ruptly terminating below, the basal lip being thin and some- 

 what retracted. Length 9, diam. 4, alt. of aperture 4.5 mm. 



Liberia, with C. redfieldi, Subulina angustior and S. stri- 

 atella. Type no. 58201 A. N. S. P. 



This species seems to be well distinguished by the grooves 

 of the surface and nearly straight columella. C. inornata 

 Ohaper is described as having a straight columella, but with- 

 out grooves. In C. sulcata and daillyana the columella is 

 strongly twisted. 



