136 PULMONATA. 



n. African. 



171. Nanina Sowerbyana. 



Shell subperforated, depressed, solid, slightly shining, sub- 

 decussated with close concentric striae and distinct lines of 

 growth, olivaceous-lutescent ; spire depressed; whorls four and 

 a half, nearly level, rapidly increasing, the last depressed, dilated 

 in front, deeply excavated beneath around the obsolete perfora- 

 tion ; ajierture very oblique, lunate-oval, milky inside ; peri- 

 stome slightly thickened, margins united by a very thin callus, 

 the upper arched forwards, the columellar slightly reflected, sub- 

 dentate. Lat. niaj. 52, min. 44, alt. 25 mill. 



Helix Sowerbvana, Pfr. Symb. i. 36. 



Phil. Icon. i. 2. p. 21. t. 2. f. 1. 



Chemn. ed. 2, Helix, n. 157. t. 25. f. 5, 6. 



Pfr. Mon. Helic. i. 68 ; Ic. i. 192. 



Reeve, n. 386. t. 74. 

 Nanina (Ryssota) Sowerbyana, Alb. 61. 

 Helix pachistoma, Hombr. &• Jacq. Voy. Pol Sud, Moll. t. 3. 



f. 10-12. 

 Hab. Canaries. 



172. Nanina Grateloupi. 



Shell slightly perforated, semiglobose, slightly shining, regu- 

 larly and closely striated above, irregularly decussated with spiral 

 lines, dull chestnut, smooth beneath ; whorls six, slighth' con- 

 vex, the last nearly level beneath ; suture slightly margined ; 

 aperture lunar, concolorous inside ; peristome simple, acute, 

 dextral margin sinuous, columellar callous, a little reflected. 

 Lat. maj. 26^, min. 24, alt. 15 mill. 



Helix Grateloupi, Pfr. Symb. ii. 9.9 ; Mon. Helic. i. 69 ; Ic. i. 205. 



Ckemn. ed. 2, Helix, n. 173. t. 31. f. 13, 14. 

 Helix rufescens, Grat. Act. Bord. xi. 408. t. 1. f. 3? 

 Nanina (Xesta) Grateloupi, Alb. 59. 

 Hab. Madagascar ? 



*tr>" 



173. Nanina rufa. B.M. 



Shell perforated, slightly depressed, thin, closely striated, 

 slightly decussated with obsolete, concentric lines, horny-red ; 

 spire scarcely elevated ; whorls six, very little convex, the last 

 dilated, more convex beneath, angulated above the middle; angle 

 evanescent in front ; a])erture nearly vertical, lunar ; peristome 

 simple, obtuse, columellar margin very slightly reflected. Lat. 

 maj. 19, min. 17, alt. 10 mill. 



