BULIMULUS-BOSTRYX-PERON.EUS. 141 



The aperture is narrower than in B. pupiformis, and the outer lip 

 is acute and not expanded. Hidalgo thinks that Reeve's figure 

 85 represents this species and not the true pupiformis. 



B. NANUS Reeve. PI. 45, fig. 22. 



Shell rather elongated, umhilicated. Whorls 8, convex, very 

 finely striated, strice slightly plicated beneath the sutures. Columella 

 vertical ; aperture small ; lip simple. Pale ash color, obscurely 

 marked here and there with light brown streaks, apex brown. Alt. 

 10 mill (Reeve). 



Chili. 



Bnlimu* iianus REEVE, Conch. Icon., pi. 79, fig. 585 (Sept., 1849). 

 ? PER., Monogr., iii, p. 344. 



PfeifFer's description must be consulted with hesitation, for it was 

 probably based upon another species. B. nanus is not known to me 

 by specimens. It seems very closely allied to B. lactifluns and 

 atacamensis. 



B. LEUCOSTICTUS Philippi. PI. 45, figs. 23, 24. 



Shell subumbilicate, fusiform-turrited, thin, rather smooth ; 

 brownish, maculate and guttate with milky in scattered pattern. 

 Whorls 8-9, moderately convex, the last one-fourth the length. 



Aperture oblong-ovate, little oblique ; peristome simple, thin, sub- 

 reflexed ; columellar margin broadly expanded ; margins approach- 

 ing, joined by a delicate parietal callus. (Phil.). 



Alt. 61, diarn. 2 lines; aperture, alt. 2} lines. (Phil.). 



Alt. 14*, diam. 4 mill.; aperture, alt. 4} mill. (Pfr.). 



Paposo, desert of Atacama, Chili (Phil.). 



Bulimus leucostictus PHIL., Malak. Bl., 1856, p. 53; Reise durch 

 die Wiiste Atacama, p. 184. PER., Mouogr., iv, p. 411; Novit. 

 Conch., iii, p. 413, pi. 94, f. 17, 18. HIDALGO, Journ. de Conch., 

 1870, p. 56. 



This species shows sometimes a whitish, sometimes an almost rose- 

 red color. It differs from B. lichenum in the smaller size, thinner 

 shell and different coloration ; the peristome is more strongly ex- 

 panded, especially toward the columella, and the ends approach 

 more. It differs from B. terebralis in being umbilicated, less 

 slender, and with more approaching ends of the peristome. (Phil.). 



Pfeiffer describes it as " striatulate, pale corneous, variegated with 

 dots and little lines of opaque white." 



