248 PERUSSACIA, SECTION PEGEA. 



15, f. 5-8 ; Moll, nouv., litig. etc. p. 269, pi. 40, f. 5-8. PFR., 

 Monogr. viii, p. 301. KOBELT, Iconogr. vii, p. 27, f. 1179. 

 Closely resembles F. lamellifera, but lacks a parietal lamella. 



Group of F. carnea. 



Shell comparatively opaque, with a strong parietal lamella, 

 outer lip thick, with a strong callus ; the spiral increase quite 

 regular (except in F. lamellifera) . It is especially a Tunisian 

 group, but one species occurs in Italy, where Bourguignat 

 believes it to have been introduced. 



35. F. CARNEA (Risso). PI. 43, figs. 4 to 8. 



Shell cylindric-turri'te, rather solid, little shining, opaque, 

 smooth or very lightly, irregularly striatulate, buff or rufous- 

 oorneous. Spire shortly conic, gradually tapering. Whorls 

 7, flattened, parted by a distinct, margined, duplicated suture ; 

 the upper whorls are flat and increase very slowly; the ante- 

 penult, whorl is much more convex, the last two larger, separ- 

 ated by a very oblique suture. The last whorl does not des- 

 cend, is rounded below, and about half the total length ; behind 

 the mouth it is broadly bordered with yellow. Aperture 

 nearly vertical, ovate, acute above, two-fifths the total length. 

 Deep on the parietal wall a compressed entering parietal la- 

 mella stands. Perist/ome unexpanded, the margins joined by 

 a distinct callus ; outer lip thickened with a thin whitish 

 callus ; more or less produced forward in the middle. Colu- 

 mella short, vertical, twisted, more or less bidentate. In 

 oblique view the upper denticle frequently appears as a more 

 or less pronounced horizontal fold, the lower as a truncation. 

 Length 12 to 15 diam. 4 to 5 mm. (Kobelt). 



Northern Tunis and in the prov. of Constantine, Algeria, 

 common and generally distributed. Introduced in the islands 

 Pianosa. and probably Alicuri, and formerly at Nice. 



Pegea carnea Risso, Hist. Nat. Eur. Merid. iv, p. 88, pi. 3, 

 f. 20, 1826. Ferussacia carnea BOURGUIGNAT, Moll. Alpes 

 Maritimes p. 52, pi. 1, f. 23-25; Malac. Algerie p. 50, pi. 3, 

 f. 32-35. Prodr. Malac. Tunisie p. 121. KOBELT, Iconogr. n. 

 F. vii, p. 33, pi. 188, figs. 1193-1197. 



