BULIMULUS-BOSTRYX-LISSOACME. 175 



B. ALBICANS Broderip. PI. 48, figs. 4, 5. 



Shell umbilicated, obese-ovate, rather thin ; white with indistinct 

 grayish streaks or closely speckled and streaked throughout with 

 brown, the markings translucent by transmitted light, apex roseate 

 or corneous. Surface with rather coarse, irregular growth-wrinkles, 

 more or less plicate below sutures, and decussated above the middle 

 by spiral incised lines, rather few and sometimes subobsolete. Spire 

 conic, apex rather obtuse, smooth. Whorls 5?, convex. 



Aperture over half the alt., ovate, brownish inside ; outer lip thin, 

 sharp, unexpanded, often pinkish within. Columella dilated above, 

 nearly straight, brownish or rose ; parietal wall with almost imper- 

 ceptible glaze. Alt. 16, diam. 11 mill. 



Chili : Copiapo (Cuming) ; Huasco (Paz & Martinez) ; San Lor- 

 enzo (U. S. Expl. Exped.). 



Bulinus albicans BROD., P. Z. S., 1832, p. 105 (published July 

 31, 1832) SOWERBY, Conch. Illustr., f. 22, 22*Bulimus albicans 

 DESH. in Lam., An. s. Vert, viii, p. 274. POT. & MICH., Galerie, 

 i, p. 135, pi. 14, f. 7, 8. HIDALGO, Journ. deConchyl., 1870, p. 52 ; 

 1875, p. 128. PFR., Monogr., ii, p. 191 ; vi, p. 125. HUPE in Gay, 

 Historia de Chile, viii, p. 109, pi. 3, f. 6. B. spixii P. & M., t. c., p. 

 155, pi. 15, f. 13, 14. B. conspersus P. & M., t. c., in index, p. 19. 

 B. albus var. albicans HIDALGO, Viaje al Pacif., p. 84. Not B. 

 albicans Reeve. B. conspersus var. ,3 PFR., Monogr., ii, p. 191. 



Decidedly smaller and thinner than well developed B. albus or 

 erythrostomus, but some specimens of the latter I have seen approach 

 albicans in stature. Hidalgo unites it with B. albus as a small 

 variety. See remarks on the species of this group, above. 



The shell may be either almost white or much streaked and angu- 

 larly speckled, and the rose color of the mouth is often lacking, and 

 when present not very strong. 



B. PRUINOSUS Sowerby. PI. 1, figs. 4, 5. 



Shell umbilicated, ovate-conic, rather solid but thin ; corneous, 

 flecked and streaked with white, or opaque white flecked and streaked 

 with corneous, the latter predominating on spire, earlier whorls 

 smooth, corneous. Surface smoothish, with wrinkles of growth, and 

 above the periphery cut into spiral series of long granules by spiral 

 lines. Spire conic, the apex obtuse, smooth. Whorls 5, slightly 

 convex, the sutures more or less crenulated. 



