FERUSSACIA, SECTION PEGEA. 243 



Group of F. procerula. 



Whorls quite convex, the suture pronounced; aperture 

 toothless, but having a small parietal lamella deeply im- 

 mersed, columella short, straight delicate, acuminate below, 

 the other margin thin; increase of whorls regular (excepting 

 F. procerula) , a little accelerated at the penult, whorl. 



26. F. PROCERULA (Morelet). PI. 43, fig. 1. 



Shell fusiform-elongate, rather solid, very lightly striatu- 

 late, glossy fulvous; spire long-conic, apex a little obtuse. 

 Whorls 6 to 7, subplanulate, separated by a linear, submar- 

 gined suture, the upper slowly, the last two rapidly increas- 

 ing, the last whorl hardly as long as the spire, somewhat 

 tapering basally. Aperture subvertical, edentulous, irregu- 

 larly ovate, acuminate at both ends; peristome obtuse, the 

 outer margin a little arcuate, produced in the middle, very 

 lightly thickened outwardly. Length 12.5, diam. 4, aperture 

 5 mm. (Kobelt.) 



Algeria: La Calle, type locality; Bone, Hammam-Meskou- 

 tin, Constantine and Algiers; Tunis: Kerez, Djebel Resas. 



Glandina procerula MOREL., Journ. de Conchyl. ii, 1851, 

 p. 357, pi. 9, f. 12; iii, 1853, p. 292. Achatina p., PPR., 

 Monogr. iii, p. 511. Ferussacia procerula BGT., Amen. Malac. 

 i, p. 198, pi. 19, f . 7-9 ; Malac. Algerie ii, p. 46, pi. 4, f . 3-7 ; 

 Prodr. Malac. Tunisie p. 119. KOBELT, Iconogr. vii, 1896, 

 p. 25, pi. 186, f. 1176. 



Though without a parietal lamella, this species clearly 

 belongs to the subgenus Pegea. 



27. F. LITTORALIS Bourguignat. 



Shell elongate, glossy, subpellucid, pale corneous, polished ; 

 spire long, rather regularly tapering, apex obtuse; whorls 7, 

 convex, regularly increasing, parted by a relatively deep 

 suture; the last whorl more than a third the total length, 

 convex. Aperture suboblique, oblong-piriform, acutely an- 

 gular above, having a very minute lamella deep in the mouth, 

 visible in oblique view; oolumella relatively short, moderate, 

 acuminate, lightly curved, within denticulate above ; peristome 



