HOHENWARTIANA. 331 



larging, the last flattened-cylindric, about equal to the spire. 

 Columella subvertical, intorted, obsoletely and obliquely trun- 

 cate, not reaching the base. Aperture ovate-angulate, peris- 

 tome simple, unexpended, acute, the margins joined by a 

 thin callus, outer lip slightly arching forward, subexpanded. 

 Length 6.5, diam. 2.33, aperture 3x1.3 mm. (Benoit). 



Sicily : Palermo, type loc. ; Algeria at Bone ; Crete ; Dar- 

 danelles; Samsun, Asia Minor. 



Achatina bourguignatiana BEN., Illustr. test. estr. Sicil. 

 pt. iv, 1862, p. 241, pi. 8, f. 5. Ferussacia &., BGT., Malac. 

 Alger. ii, p. 68, pi. 4, f . 35-40 ; Revue et Mag. Zool. xvi, 1864, 

 p. 212. Cochlicopa &., CAFICI, II Nat. Sicil. i, p. 204. 



A peculiar species, not well described by Benoit. It is 

 characterized by the second whorl being disproportionately 

 large, the following whorl narrower; then the last two whorls 

 increase with great rapidity, the last 1% turns of the suture 

 descending very steeply. It is figured on pi. 50 from a speci- 

 men received from Benoit. Bourguignat's figures are copied, 

 pi. 48, figs. 24-26. It has been recorded from various points 

 around the eastern basin of the Mediterranean. 



5. H. THAMNOPHILA (Bourguignat) . PL 51, figs. 7, 8. 



Shell very minute, very fragile, clear glassy, polished; 

 spire attenuate, terminating in a short cone; apex rather ob- 

 tuse, somewhat mamillate. Whorls 6, slightly convex, irreg- 

 ularly increasing, the first two rapidly widening, third 

 slowly, the fourth and rest rapidly increasing, separated by 

 a rather impressed and duplicated suture, the last almost 

 half the total length. Aperture oblong; columella scarcely 

 lamellose, not reaching the base, and appearing subtrun- 

 cate; peristome unexpanded, acute, the outer margin arch- 

 ing forward, especially in its anterior part; margins joined 

 by a very thin callus. Length 4, diam. 1.25, aperture 1.75 

 mm. (Bgt.) 



Algeria : drift debris of the Frais-Vallon, 1 kilometer be- 

 low the fortifications of Algiers, near the gate Babel-Oued 

 (Bgt.). Also occurs in Sicily (Benoit, Cafici). 



Ferussacia thamnophila BGT., Malac. de 1'Algerie ii, p. 69, 

 pi. 4, f. 41-44 (1864). BENOIT, Catalogo p. 86. 



