290 LEPTINARIA. 



very finely striatulate, pellucid, very glossy, waxen. Apex 

 obtuse. Whorls 6, a little convex, the last five-twelfths the 

 total length; suture deep, very narrowly margined. Aper- 

 ture semioval ; parietal wall bearing one thin entering lamella ; 

 peristome simple, acute, the right margin slightly arched for- 

 ward, basal margin subeffuse, columella twisted inward, cal- 

 lously truncate above the base. Length 12, diam. 5.5, aper- 

 ture 5.5 x 3 mm. Humacao, Porto Rico (Shuttl.) . 



B. unilamellatus Orb. Shell elongate, white or slightly 

 yellow tinted, a little ventricose, thin, diaphanous, smooth or 

 lightly marked with striae. Spire conic, obtuse at the summit, 

 composed of 7 slightly swollen whorls, the last occupying more 

 than half the length of the shell. Aperture oval, a little ob- 

 lique, with sharp, simple margins. A projecting lamella 

 occupies the base of the columella and is continued into the 

 interior of the shell. Columella twisted with an acute pro- 

 jection, truncate below. Length 12, diam. 11 mm. Last foot- 

 hills of the Andes of Bolivia, at Petaca, near the Rio Piray, 

 20 leagues from Santa Cruz de la Sierra (Orb.). 



Achatina funcki Pfeiffer. Shell subperforate ovate-conic, 

 thin, striatulate, glossy, pellucid, clear straw-colored. Spire 

 conic, acute. Whorls 6, convex, the last a little shorter than 

 the spire. Aperture semioval; parietal wall provided with 

 an entering fold in the middle. Columella lamellate-truncate 

 in the middle. Peristome simple, acute. Length 12.5, diam. 

 6, aperture 6x3 mm. Province of Merida, New Granada, 

 Funck (Pfr.). 



Var. concentrica (Reeve). PI. 46, figs. 1, 2, 3, 4. 



"Shell acuminately ovate, whorls 6, concentrically plicately 

 striated, columella short, twisted, abruptly truncated, fur- 

 nished at the upper part with a callous ridge, aperture rather 

 small; horny, dull olive. Finely sculptured by numerous 

 arched concentric striae, whilst the foody-whorl is furnished 

 with a winding callous ridge. Bolivia, under dead cacti, 

 Bridges (Reeve). 



South America, from Bolivia northward. 



Achatina concentrica REEVE, Conch. Icon., v, pi. 19, f. 106 



