142 BULIMULUS-BOSTRYX-PERON.EUS. 



B. SCABIOSUS Sowerby. PI. 45, fig. 21. 



Shell rimate-perforate, oblong-acuminate, closely and distinctly 

 striate, rather solid ; variegated corneous and white, the apex black- 

 ish. Whorls 8, rather flat, the last one-third the length of shell. 

 Columella obliquely receding. Aperture oblong-oval, the peristome 

 simple, unexpanded, columellar margin broadly dilated. Alt. 16, 

 diam. 4 mill.; aperture, alt. 5z mill. (Pfr.*), 



Cobija, Chili, under stones (Cuming, Orb.). 



Bulinus scabiosus SOWB., P. Z. S., 1833, p. 74 ; Conch. Illustr., f. 

 24. Bulimus scabiosus ORB., Voy. dans 1'Amer. Merid., p. 263 ; 

 POT. & MICH., Galerie, i, p. 154, pi. 15, f. 7, 8. REEVE, Conch. 

 Icon., pi. 14, f. 84. PER., Monogr., ii, p. 210; vi, p. 139; Conchyl. 

 Cab., p. 232, pi. 62, f. 34-36. 



B. TEREBRALIS Pfeiffer. PI. 45, fig. 30. 



Shell rimate perforate, with the large umbilical area defined by an 

 angle; subulate; whitish, becoming bluish-brown above. Surface 

 lusterless, irregularly wrinkle-striate, the strife somewhat cut into 

 granules by spiral impressed lines which are generally more prom- 

 inent above. Spire tapering from the last whorl to the blunt, 

 smooth, brownish-corneous apex. Whorls about 10j, nearly flat, 

 the last cylindrical, obliquely truncated below by a blunt but project- 

 ing angle, oner which the riblets do not pass, and which defines the 

 umbilical tract. 



Aperture one-fourth the altitude, oblique, ovate, white inside. 

 Outer lip acute, expanded and thickened within ; columellar lip 

 dilated above, vaulting over the minute perforation. 



Alt. 19-5, diam. 5'2 mill. 



Alt. 20-3, diam. 4-2 mill. 



Coquimbo, Chili, under stones and on plants by the shore (Bridges). 



Bui hit it* terebralis PFR., P. Z. S., 1842, p. 187 ; Symbols, ii, p. 

 51 ; Monogr., ii, p. 114; 5v, p. 55. HUPE in Gay, Hist. Chile, viii, 

 p. 115, pi. 3, f. 9. REEVE, Conch. Icon., pi. 14, f. 79. 



Varies somewhat in width, but not much in other characters. 

 The sculpture and the basal keel are characteristic. It is allied to 

 the smoother and stouter B. piipi/ormis, but the basal carina also 

 suggests relationship with the group of B. columellaris. 



B. BISCULPTUS Pfeiffer. PI. 45, figs. 25, 26. 



Shell subperforate, obloug-turrited, rather solid ; lightly plicate- 

 striate above, smooth below the middle ; slightly shining ; white, 



