248 SOUTH AMERICAN OBELISCUS. 



hnperforate. Whorls 11 or 12, convex, gradually increasing, 

 parted by a deep suture. Spire very long, the apex obtuse. 

 Aperture ovate, thin, the mairgin simple and aicute. Color 

 of the shell white. Length 1 inch 3 lines, width 3 l / 2 lines 

 (Wagn.). 



Brazil: Province Piauhy in woods (Spix). 



Columna sylvatica SPIX on plate. - - Bulimus sylvaticus 

 AVAGNER, Testacea fluviatilia quae in itinere per Brasilia, 

 etc., p. 11, pi. 10, f. 4 (1827). Bulimus sylvaticus Spix, 

 EEEVE, Conch. Icon., v, Ackatina, pi. 18, f. 95. HIDALGO, 

 Journ. de Conch., 1875, p. 130. 



The original description and figure (copied in fig. 54) 

 agree with specimens collected by J. G. Anthony, due allow- 

 ance being made for bad drawing in Spix's figure, which has 

 the sutures too oblique. I figure one of Anthony's shells, 

 pi. 34, fig. 55. It is thin, imperf orate, pale greenish-yellow, 

 very glossy, with irregular wrinkles immediately below and 

 slightly crenulating the sutures, but elsewhere obsolete. The 

 spire tapers regularly to a very obtuse apex. Whorls 11%, 

 evenly and moderately convex. The columella is slightly 

 concave, nearly straight, thin, not at all calloused, but re- 

 flected and adnate above. Length 31.7, diam. 7.3, aperture 

 6.7 mm. ; diam. at second whorl 2 mm. 



According to Hidalgo, this species was collected by Paz at 

 Bahia and Rio Janeiro. 



Var. columella (Philippi). PI. 34, figs. 49, 50. 



Shell cylindric-turrite, the apex obtuse; very smooth, very 

 glossy, dirty white ; whorls 10, a little convex, the last sub- 

 angular at base. Aperture oblique, semiiovate, the peristome 

 simple, unexpended. Length 25, diam. G 1 /^ aperture S 1 /^ 

 mm. (Phil.}. 



Brazil. 



Bulimus columella PHIL., Abbild. Beschreib. neuer oder 

 wenig gekannter Conichylicn, i. p. 158, Bulimus, pi. 2, f. 7 

 (Oct., 1844). PFR,, Monogr.. ii, p. 155. 



Pfeiffer has reduced this to a synonym of 0. sylvaticus in 

 the later volumes of the Monographia (vi, p. 91). A speci- 



