262 FERUSSACIA, SECTION PEGEA. 



F. celosia BGT., Malac. de 1'Algerie ii, p. 57, pi. 4, f. 14-16 

 (1864); Prodr. Malac. Tunisie p. 125. Oionella eclosia Bgt, 

 WESTERLUND, Fauna Pal. Reg. Moll, iii, p. 165. 



" Differs from sciaphila by the more lanceolate, more fusiform 

 shell, the spire not attenuate but acuminate, the summit prom- 

 inent and lanceolate, the first two whorls atrophied, replaced by 

 calcareous material; finally by the columella, which has the upper 

 tubercular prominence stronger and more projecting than the 

 lower" (Bgt.}. 



53. F. SCIAPHILA Bourguignat. PL 43, fig. 9. 



Shell cylindric-fusiform, solid, very glossy, pellucid, smooth, 

 amber-orange, especially towards the aperture. Spire attenuate, 

 the apex obtuse, mamillate. 7 whorls, nearly flat, the first 4 

 small, increasing slowly and regularly, the fifth increasing dis- 

 proportionately rapidly, more convex on the left side; last whorl 

 not over half the total length. Suture superficial, with a border 

 below. Aperture narrowly oblong, angular above, with a rather 

 deeply immersed white, strong parietal lamella. Columella 

 straight, whitish, twisted, having two small tubercles. Peri- 

 stome unexpanded, a little thickened; outer lip strongly arched 

 forward; margins united by a transparent but well-marked callus. 

 Length 11, diam. 4, aperture 5 mm. (Bgt.}. 



Algeria: Bona, under stones in shady places. 



F. sciaphila BGT., Malac. de 1'Algerie, ii, p. 56, pi. 4, f. 11-13; 

 Amen. Malac., i, p. 201, pi. 19, f. 17-19 (1856). KOBELT, 

 Iconogr., vii, p. 30, pi. 187, f. 1187. 



54. F. CIRTANA Bourguignat. PL 45, fig. 25. 



Shell oblong-ventricose, fragile, pellucid, very glossy, very 

 smooth, uniform corneous, with a whitish zone around the 

 suture ; spire tapering, apex obtuse, as though mamillate. 

 Whorls 6J, flattened, the last a little convex, the upper small, 

 last two more rapidly increasing, separated by a superficial, 

 duplicated suture; last whorl large, regularly descending, con- 

 vex at the aperture. Aperture vertical, lunate-oblong, acutely 

 angular above; columella whitish, short, truncate at the base, 

 the outer lip lightly arched forward, peristome unexpanded, 



