132 BULIMULUS-BOSTRYX-ATAXUS. 



Aperture somewhat less than one-third the length of shell, light 

 brown within, twice as high as wide, narrow, and angular at both 

 ends; peristome sharp and simple, the outer lip unexpanded, col- 

 umellar lip long, slightly dilated above. Alt. 17, diam. 6 mill. 



Peru. 



B. TUBULATUS Morelet, PI. 44, figs. 95, 96. 



Shell umbilicated, conoid-turrited, solid, arcuately and distantly 

 costulate, scarcely shining, white. Whorls 9, slightly convex, the 

 last slightly over one-third the length of shell, much compressed at 

 base, angulated around the wide, perspective umbilicus. 



Aperture narrow, oblong, biangular, pale tawny within ; margins 

 simple, approaching aud joined by a callus, the upper straight, col- 

 umellar narrowly spreading. Alt. 19, diam. 6 mill. (Mor.~). 



Valley of Andahuaylas, Peru, on grassy slopes (Angrand). 



Bulimus tubulatus MOREL., Journ. de Conch., viii, 1860, p. 375. 

 PFR., Monogr., iv, p. 121. B. tnbulatus MOREL., Ser. Conch., iii,p. 

 204, pi. 11, f. 4. 



This shell looks like B. infundibulum, but is at once distinguished 

 by the sculpture. Instead of being smooth like umbilicaris, or 

 densely covered with striae as in infundibulum, it is ornamented with 

 little projecting, regular, spaced ribs, with no striae in the intervals. 

 The amptitude of the umbilicus and shortening of the aperture 

 separate it moreover from the second of these species, with which 

 its relationship is more intimate. The shell is solid, whitish, with- 

 out luster, the earlier whorls corneous and transparent. (Morel.'). 



B. SCALARICOSTA Morelet. PI. 44, figs. 97, 98. 



Shell umbilicated, fusiform-turrited, rather solid, strongly and dis- 

 tantly ribbed; lusterless, dull white. Spire turriculated, pale 

 corneous toward the apex. Whorls 9, nearly flat, lightly coarctate 

 in the middle, the last whorl nearly a third the total length, com- 

 pressed at base, with a crenulated angle around the wide and deep 

 umbilicus. 



Aperture narrow, oblong, pale tawny inside ; peristome continu- 

 ous, simple, the upper margin unexpanded, columellar margin 

 slightly spreading. Alt. 15, diam. 5 mill. (Morel.). 



Plateau of Andamarca, Prov. Cuzco, Peru (Angrand). 



Bulimus scalaricosta MOREL., Journ. de Conch., viii, 1860, p. 

 375 ; Ser. Conch., iii, p. 205, pi. 11, f. 8. PFR., Monogr., vi,p. 139. 



