254 FERUSSACIA, SECTION PEGEA. 



Algeria: around Saida. 



F. agracia BGT., Malac. de 1'Algerie ii, p. 51, pi. 3, f. 36- 

 38 (1864). KOBELT, Iconogr. vii, p. 33, pi. 187, f. 1192. 



"Stands very near F. lamellifera, but the whorls increase 

 regularly." (Kobelt) . 



Group of F. charopia. 

 Shell elongate, with regular, rather slow spiral increase. 



39. F. DACTYLOPHILA Issel. PL 43, fig. 12. 



Shell slender, cylindric-fusiform, long, very glossy, pel- 

 lucid, smooth, pale corneous, under a lens very minutely 

 longitudinally striate. Spire tapering above, 'the 'apex a little 

 obtuse. Whorls 7-7^, irregularly increasing, the upper 

 whorls rather regularly increasing, fourth dilated, the rest 

 very large, separated by a paler duplicated suture, last whorl 

 over one-third the total length. Aperture long-piriform, 

 subangular below, with a median parietal lamella. Colu- 

 mella whitish, straight, slightly calloused, sub truncate; mar- 

 gins joined by a very thin callus. Length 11.75, diam. 3.5, 

 aperture 4.5 mm. (Issel). 



Tunis: Oasis of Gafsa, in the Tunisian Sahara, type loc., 

 at Carthage etc., etc. Also known from Algeria at El Kan- 

 tera, Biskra and Boghari. 



F. dactylophila ISSEL, Annali del Museo Civico di Storia 

 Naturale di Genova, xv, p. 274, with fig. in text, 1880. LET. 

 et BOURGUIGNAT, Prodr. Malac. Tunisie p. 124. F. isseli 

 BGT. MSS. 



40. F. BARATTEI Letourneux et Bourguignat. 



Shell oblong, fragile, pellucid, glossy, corneous, polished; 

 spire rather produced, tapering in an oblong shape, the apex 

 obtuse. Whorls 7, slightly convex, slowly increasing to the 

 fifth, then a little more rapidly, separated by a linear paler 

 suture; the last whorl large, a little convex, nearly half the 

 total length. Aperture vertical, oblong, very angular above, 

 appearing toothless, but obliquely lamelliferous, the lamella 

 small, deeply immersed. Oolumella short, slender, acumin- 



