PERUSSACIA, SECTION PEGEA. 245 



buff on the lip; polished; spire oblong, regularly tapering; 

 the apex a little obtuse; whorls 7, slightly convex, regularly 

 but still rather rapidly increasing, separated by a linear su- 

 ture, the last whorl rather large, nearly half the total length, 

 a little convex. Aperture slightly oblique, elongate, acutely 

 'angular above, subangular below at the base of the aperture, 

 outwardly arcuate, somewhat whitish within, and having a 

 minute lamella deep within on the parietal wall. Columella 

 strong, thick, straightly descending, subdenticulate above, 

 somewhat subtruncate below. Peristome unexpanded, a little 

 obtuse, thickened a little within, the outer lip scarcely arcu- 

 ate ; margins joined by a thin -callus. Length 13, diam. 4, 

 aperture 6 mm. (Bgt.). 



Tunis: Temple of the Nymphs at Djebel Zaghouan, rare, 

 in shady places ; Djebel Bou-Kournein. 



F. nympharum BGT., Prodr. Malac. Tunisie p. 119, 1887. 



30. F. SUBSACCATA 'Ancey' Westerlund. 



Shell narrowly oblong, rather thin, glossy, corneous, finely 

 striate. Spire regularly tapering above, rather blunt. 

 Whorls 7, rather regularly, the lower rather rapidly increas- 

 ing, somewhat convex with linear suture ; the last whorl long, 

 regularly convexly contracted. Aperture produced, nar- 

 rowed above, vertical, with a strong parietal lamella visible 

 in oblique view; outer margin elliptical, base regularly 

 arcuate, Columella obliquely plicate-twisted within, with a 

 strong tooth above, acuminate below, not truncate. Outer 

 lip obtuse, but scarcely thickened, nearly straight, a little 

 retracted below; parietal callus thin. Length 12, diam. 4, 

 aperture 5 mm. (Westerl.). 



Algeria : Biban, Constantine province. 



Cionella subscwcata, Ancey MSS., WESTERLUND Fauna der 

 in der Palaarctischen Region Lebenden Binnenconch., Suppl., 

 p. 48, 1890. 



Group of F. hagenmulleri. 



Shell oblong, quite long, with nearly flat whorls, superficial 

 suture, and regular spiral increase; aperture toothless or la- 

 mellate ; columella short, robust ; outer lip a little thickened. 



