222 FERUSSACIA. 



suture, the last whorl rounded, not half the total alt. Aper- 

 ture lunate-oblong; peristome unexpanded, acute, a little 

 thickened within; columella straight, callous within; outer 

 margin strongly arched forward, the margins joined by a thin 

 callus. Length 6, diam. 3.5, alt. apert. 3.5 mm. (Ferussacia 

 amauronia BGT., Malac. chat, d'lf, pi. 2, f. 14-16, Jan. 1860; 

 Malac. de TAlgerie i, p. 37, pi. 3, f. 10-12). 



Algeria; Portugal at Algarves (Bgt.). Differs from F. 

 regularis by the more obese shell, summit more obtuse, whorls 

 of the spire less closely coiled, and the outer lip is more 

 strongly arcuate, within a little recession at the insertion. It 

 is also more obtuse and ventricose than typical F. folliculus, 

 with less numerous whorls, which increase very regularly, etc. 



Var. REGULARIS Bourguignat. (PL 41, fig. 56). Whorls 

 7, regularly increasing, the last less than half the total length. 

 Columella straight, short, with a slightly twisted lamella be- 

 low. Length 10, diam. 3, aperture 3.75 mm. Type locality 

 around Valletta, Malta; also occurs around Portici, near 

 Naples (Bgt.), and in the drift of the Oued Sidi-Aich, Tunis 

 (Letourneux et Bgt.). 



Ferussacia regularis BGT., Malac. terrest. de 1'ile du Chateau 

 d'lf, pres de Marseille, p. 20, pi. 2, f. 7-9 (Jan. 1860) ; Revue 

 et Mag. de Zool. xvi, 1864, p. 204; Prodr. Malac. Tunisie p. 

 117. PFR., Monogr. vi, 248. 



2. F. RURICOLA (Lowe). PL 42, figs. 68, 69. 



Shell rather large, rather strong, subpellucid, turrite, sub- 

 cylindric, long and somewhat slender, the spire produced, 

 rather obtuse. Whorls 6, flattened, parted by an oblique, 

 little impressed, margined suture. Aperture ovate, acute 

 above but not acuminate, close to but scarcely over one-third 

 the length. Columella arcuate, subdilated, slightly promi- 

 nent and obscurely obliquely truncate at base, the peristome 

 simple. Length 8, diam. 2.5, aperture 2.75 mm. (Lowe.) 



Morocco: near Mogador (Lowe). 



Achatina ruricola LOWE, Journ. of the Proceedings of the 

 Linnean Soc., Zool. v, 1861, p. 203. Ferussacia ruricola 

 PALLARY, Journ. de Conchyl. 1898, p. 124, pi. 9, f. 3. 



