174 BULIMULUS-BOSTRYX-LISSOACME. 



Var. ALBUS Sowerby. PI. 48, figs. 98, 99. 



Form, size and sculpture as in erythrostomus ; but the spirals are 

 less developed than in average erythrostomus, often almost obsolete. 

 White, with faint bluish streaks, or longitudinally striped with cor- 

 neous. Interior of aperture, the columellar expansion and parietal 

 callus yellowish-white or light brown. 



Copiapo (Cuming) ; Questa de Arenas, near Huasco (Bridges) 

 Chamarcillo and Coquimbo (Paz) in sandy places, Chili. 



Bulinus albus SOWB., P. Z. S.., 1833, p. 73 (published Sept. 20, 

 1833) ; Conch. Illustr., f. 52. Bulimus albus DESH. in Lam., An. 

 s. Vert., p. 269. ORB., Voy. dans 1'Amer. Mcrid., p. 280. HUPE, 

 in Gay, Historia de Chile, viii, p. 108, pi. 3, f. 5. PFR., Monogr., 

 ii, p. 190; vi, p. 125; Conchyl. Cab., p. 199, pi. 55, f. 11-14. 

 HIDALGO, Journ. de Conchyl., 1870, p. 54 ; Viaje al Pacif., p. 83. 

 Bulimus olorinus DUCLOS, in Guerin's Mag. de Zool., 1833, pi. 24. 

 Helix olorinus Orb., olim. Bulimulus albus BECK, Index, p. 68. 

 f Bulimus albicans REEVE, Conch. Icon., pi. 22, f. 141. 



The coloring of the aperture, upon which alone this species was 

 based, is not likely to prove a character of specific value, in view 

 of the wide variation observable in the numerous specimens of B. 

 erythrostomus before me. 



B. HUASCENSIS Reeve. PI. 48, fig. 3. 



Shell long-ovate, umbilicated, solid, opaque and white, with indis- 

 tinct grayish streaks, or faintly pink with fleshy streaks. Surface 

 with irregular, fine growth-wrinkles and subobsolete spiral incised 

 lines above. Spire long, apex pink or corneous, obtuse, smooth. 

 Whorls 6, convex, sutures deep. 



Aperture half as long as shell, ovate, light yellowish-brown inside ; 

 lip thin and acute. Columella broadly dilated, whitish, its inner 

 edge straightened. Parietal wall with a light wash of white callus. 



Alt. 20, diarn. 12 mill. 



Huasco, Chili (Bridges). 



Bulimus huascensis REEVE, Conch. Icon., pi. 23, f. 147 (June, 

 1848). DESH. in Fe>., Histoire, ii, p. 85, pi. 150, f. 5, 6. PFR., 

 Monogr., iii, p. 431 ; vi, 143. 



Like B. albus in texture, color, sculpture and umbilicus, but with 

 the aperture smaller and form more slender. It will probably prove 

 a varietal form. 



