290 LEPTINAEIA. 



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 5.5x3 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 (P/V.). 



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 body-whorl is furnished 

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

 Bridges (Reeve). 



South America, from Bolivia northward. 



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



