BULIMULUS-BOSTRYX-PERON^EUS. 151 



Similar to Buliminus sidoniensis Fer., differing in the oblong 

 aperture, columellar fold, etc. (Pfr.*). 



Locality and systematic position very doubtful. 



B. BIFORMIS Pfeiffer. PI. 46, figs. 61, 62. 



Shell profoundly rimate, ovate-oblong, rather solid, rather rugosely 

 striatulate. Spire ovate-conic, the apex obtuse ; suture subcrenate. 

 Whorls 6, the earlier 3 corneous and convex, the rest a little con- 

 vex, whitish ; last whorl about equal to two-fifths the total alt., a 

 little compressed at base. 



Aperture little oblique, truncate-oblong, the columella very 

 slightly folded ; peristome white-lipped, margins joined by a thin 

 callus, the outer margin unexpanded, a little expanded below ; col- 

 umellar margin dilated, flat, wide. Alt. 14, diam. 6 mill. ; aperture, 

 alt. 6, width 3 mill. (Pfr.). 



Peru? 



B. biformis PFR., Malak. BL, i, 1854, p. 223 ; Monogr., iv, p. 498 ; 

 Novit. Conch., iii, p. 492, pi. 106, f. 5, 6. 



A very doubtful member of this group. It may prove to be an 

 Old World species of the genus Buliminus. 



B. WOODWARDI Pfeiffer. Unfigured. 



Shell perforate, ovate-turrited, rather solid, striatulate and sub- 

 malleate, rather shining, tawny-white. Spire long-conic, rather 

 acute. Whorls 8, a little convex, the last little shorter than the 

 spire, subattenuated at base. Columella receding. Aperture ob- 

 lique, oval-oblong ; peristome simple, unexpanded, the right margin 

 slightly arcuate; columellar margin dilated above, vaultingly re- 

 flexed, half covering the narrow perforation. Alt. 31, diam. 13* 

 mill. ; alt. of aperture 15, width 7 mill. (Pfr.). 



Andes. of Peru (Cuming Coll.). 



B. ivoodwardi PFR., P. Z. S., 1856, p. 332 ; Monogr., iv, p. 488 ; 

 Nomencl. Hel. Viv., p. 256 (Peronceus). 



B. CALCHAQUINUS Doering. 



Shell rimate, fusiform-turrited, thin, irregularly and closely rugose- 

 striated ; corneous or corneous-buff, variegated with whitish, raised, 

 rugose, irregular streaks. Spire long, rather obtuse. Whorls 8, 

 moderately convex, the first corneous, smoothish, the rest varie- 

 gated ; last whorl convex, about one-third the total alt. 



