LIMICOLARIA, WEST AFRICA. 263 



rowly margined with an impressed line; the last whorl (be- 

 hind) is a little shorter than the spire, rounded, obsoletely 

 flattened in the middle, the streaks bent below the middle, 

 producing the effect of an angle, but sometimes it is really 

 angular, the angle disappearing near the aperture; base 

 compressed in a distinct keel around the perforation. Aper- 

 ture nearly vertical, angulate-elliptical, bluish-white inside, 

 showing the external streaks through. Columella slightly 

 arcuate, slightly twisted, violaceous; peristome unexpanded, 

 very narrowly brown-edged, the margins joined by a very 

 thin callous; right margin regularly arcuate, slightly arched 

 forward in the middle; columella with a long flat reflection, 

 at its junction with the base forming a distinct angle, almost 

 a channel corresponding to the external keel. Largest spec- 

 imen, length 41.5, diam. 20, apert. length 17, width 9 mm. 

 Smallest specimen, length 33, diam. 16, apert. length 15, 

 width 8 mm. (d'Ailly). 



West Africa: Bongo, Kamerun (Dusen). 



L. kobelti D'AILLY, Bihang till K. Sv. Vet.-Akad. Handl., 

 xxii, Afd. iv, no. 2, p. 79 (1896). 



The comparatively large, open perforation, surrounded by 

 a keel-like angle, is characteristic. The columellar lip is 

 merely flattened, not rolled back as in other species. Spiral 

 sculpture is almost completely absent. In general appear- 

 ance it approaches L. tenebrica, L. martensiana, L. heuglini 

 and L. jaspidea, being most like the latter in coloration. It 

 has not been figured. 



22. L. CHROMATELLA (Morelet). PL 36, figs. 1, 2, 3. 



Shell subperforate, ovate-oblong, rather solid, nearly 

 smooth, rugose-striate near the suture ; buff or tawny-orange, 

 flamed with wide-spaced reddish chestnut streaks. Spire 

 conic, the apex rather obtuse, suture impressed. Whorls 7 

 to 8, convex, the last more than two-fifths the length; colu- 

 mella slightly twisted, receding, lilac-tinted. Aperture ellip- 

 tical, strongly angular at the base, pearly inside, marked 

 with the external streaks; peristome unexpanded, thin, the 

 columellar margin narrowly dilated, revolute. Length 37- 



