158 BULIMULUS-BOSTRYX-LISSOACME. 



Aperture ovate, less than half the shell's length, brown and yellow- 

 ish within (or white in old shells) ; outer lip simple, thin and un- 

 expanded ; columellar lip dilated as usual, the coluinella nearly 

 straight. 



Alt. 29, diam. 17, alt. of aperture 14? mill. 



Alt. 28, diam. 16-17, alt. of aperture 12* mill. 



Chili. 



Somewhat like B. hennahi, but the whorls are more numerous 

 and narrower, the spire more turrited and distinctly concave-sided 

 above, the surface smoother and the coloration different. Eleven 

 specimens, of which three are mature, are before me. The old shells 

 lack the initial whorl or two, and do not show the rich coloration of 

 the younger specimens ; and the change of contour from young to 

 old is unusually marked. 



B. LIMENSIS Reeve. PL 50, fig. 37. 



Shell umbilicated, oblong-turrited, rather solid, longitudinally 

 striated, obsoletely malleated ; fleshy-whitish, variegated with red- 

 dish streaks. Spire turrited, the apex corneous, rather acute. 

 Whorls 7, rather convex, the last rounded, about three-sevenths the 

 total alt., slightly compressed around the narrow, open umbilicus. 



Aperture oblique, oval, the peristome simple, unexpanded ; acute, 

 terminations converging ; columellar margin broadly reflexed. Alt. 

 17, diam. 8 ; length of aperture 7J, width inside 4J mill. (Pfr.}. 



Lima, Peru (Paz, Cuming) ; and Quito, Ecuador (Cuming). 



Bulimus limensis REEVE, Conch. Icon., pi. 77, f. 563 (August, 

 1849). PFR., Monogr., iii, p. 429. HIDALGO, Journ. de Conch., 

 1875, p. 130. 



B. QUITENSIS Pfeiffer. PL 51, figs. 16, 17, 18, 19. 



Shell narrowly umbilicated, ovate-conic, somewhat solid, not shin- 

 ing, closely and irregularly rugulose-striate ; whitish or pale brown- 

 ish, ornamented with unequal brown or chestnut streaks. Spire 

 conic, acute ; suture simple ; whorls 7 to 8, rather flat, moderately 

 increasing, the last convex, not descending in front, rotund at base 

 or lightly compressed. Columella subvertical, slightly arcuate, 

 whitish or blackish-chestnut. 



Aperture oval, acuminate above, rounded below, very rarely sub- 

 angulate, concolored inside, one-half the length of the shell ; per- 

 istome simple, unexpanded, acute, the right margin regularly arcu- 

 ate, usually with a blackish-chestnut border within ; columellar 



