FERUSSACIA, SECTION PEGEA. 255 



ate, nearly straight or a little curved, 'having an internal den- 

 ticle above, visible in oblique view; peristonae unexpanded, 

 acute, outer margin a little arched forward, margins joined 

 by a very thin callus. Length 11, diam. 3, aperture 5 mm. 

 (Bgt.). 



Tunis: Ain-Cherichira, amphitheatre of El Djem and Kef 

 El Djerdja. 



F. lamttei L. & B., Prodr. Mai. Tunisie p. 125. 



41. F. CHAROPIA Bourguignat. PL 44, fig. 15. 



Shell cylindric-lanceolate, rather solid, pellucid, glossy, 

 polished, smooth, under the lens obsoletely striatulate, pale 

 corneous; spire long, apex paler, obtuse; whorls 7, slightly 

 convex, gradually increasing, separated by a paler suture, 

 which seems doubled, last whorl a little more than one-third 

 the total length. Aperture oblong, whitish within, having a 

 median strong thick whitish parietal lamella. Columella 

 white, stout, twisted, callous. Peristome unexpanded, lightly 

 thickened, the outer lip regularly arched forward, margin 

 joined by a whitish callus. Length 10, diam. 3, aperture 3.5 

 mm. (Bgt.) 



Algeria: Ain-Smeida and rocks of Sel near Djelfa, type 

 loc. and in the provinces of Oran and Constanitine. Tunis, 

 Oued Sidi-Aieh, etc., etc. 



F. charopia BGT., Malac. de I'Algerie ii, p. 54, pi. 4, f. 6-10 

 (1864) ; Prodr. Malac. Tunisie p. 124. KOBELT, Iconogr. vii, 

 p. 29, pi. 187, f. 1184. 



Resembles the group of F. procerula, in its evenly increas- 

 ing whorls, but it has a strong parietal lamella, 



42. F. LALLEMANTI Bourguignat. 



Shell slender, elongate, somewhat cylindric, very fragile, 

 very transparent, nearly whitish and polished; spire long, 

 regularly tapering, a little obtuse at the summit. Whorls 7, 

 a little convex, regularly increasing, separated by a linear 

 but lightly impressed suture ; last whorl a little convex, one- 

 third the total length. Aperture vertical, oblong, with a 

 minute parietal lamella. Columella slender, straight, acumin- 



