FERUSSACIA, SECTION PEGEA. 247 



Distinguished from F. procerula by the less ventricose 

 longer shell, wider aperture, and regular increase of the 

 whorls. Bourguignat states that the parietal lamella is vari- 

 able, but according to Kobelt, who also collected it around 

 Constantine, it is always present. 



33. F. MONTANA Bourguignat. 



Shell oblong-tumid, very glossy, pellucid, corneous, pol- 

 ished; spire oblong, regularly tapering, the apex a little ob- 

 tuse. Whorls 7, slightly convex, regularly coiled to the 

 penultimate whorl, then rapidly increasing; suture linear, at 

 the penult, whorl deeply descending; last whorl large, nearly 

 half the 'total length, rather convex, slowly descending above. 

 Aperture nearly vertical, oblong-piriform, acutely angular 

 above, having a strong parietal lamella. Columella short, 

 whitish, acuminate, subdenticulate inwardly above; peristome 

 unexpended, acute, a little thickened and whitish ; outer mar- 

 gin regularly arcuate, the margins joined by a strong callus. 

 Length 15, diam. 5, aperture 7 mm. (Bgt.) . 



Algeria: Djebel Maadid, between Hodna and Medijajia; 

 summit of Mahmel, 2306 meters. Tunis : Djebel Recas, ruins 

 of Utique, etc. 



Possibly a form of F. carnea. 



F. montana BGT., Prodr. Malac. Tunisie p. 120, 1887. 



34. F. ORANENSIS Bourguignat. PI. 43, fig. 3. 



Shell long-fusiform, glossy, smooth, subpellucid, corneous, 

 the spire slightly acuminate, apex a little obtuse, paler ; whorls 

 7, slightly convex, irregularly increasing, the upper regularly, 

 the fifth more dilated, the rest large, separated by a paler 

 superficial bordered suture ; last whorl over one-third the total 

 length. Aperture long-piriform, acutely angular above, 

 rounded basally ; columella whitish, small, the base not trun- 

 cate; peristome unexpanded, acute; outer margin curving 

 forward towards the base, margins joined by a thin callus. 

 Length 12, diam. 4, aperture 5 mm. (Bgt.). 



Algeria : valley of Tied Djebbara near Oran. 



F. oranensis BGT., Rev. et Mag. Zool. xx, 1868, p. 374, pi. 



