8TROFHOCHEILUS-THAUMASTUS. 59 



Coluruella subplicate, little arcuate, somewhat purple. Aperture 

 oval, bluish-livid within, two-fifths the shell's length ; peristome 

 straight, slightly expanded, livid-reddish, the ends joined by a thin 

 callus ; right margin regularly arcuate, columellar margin reflexed, 

 half closing the perforation. Alt. 58, diam. 23 mill. (Hidalyd). 



Chanchamayo (Isern) ; Forests eastward from Huancavelica, 

 toward the Apurimac River (Tharurn). 



B. bivittatus PHIL., Archiv fiir Naturg. 1845, p. 62 (not bivittatus 

 Sowb.). B. bifasdatus PHIL. Abbild. u. Beschreib. ii, p. 10, pi. 3, f. 

 5 (1847). MARTENS, Malak. Bl. xiv,1867,p. 141. PrR.,Monogr. 

 ii, p. 199; iv, p. 487. HIDALGO, Viaje al Pacifico, Mol. p. 68. B. 

 fusiformis TSCHUDI ms. in Archiv fiir Naturg. 1852, p. 192. B. 

 bitieniatus NYST, Bull. Acad. Roy. Sci. Brux. xii, pt. 2, p. 153 

 (1845). ? 5. spixii REEVE, Conch. Icon. pi. 30, f. 182, not of 

 AVagner. B. bifasdatus var. unicolor PHIL., Malak. Bl. xvi, 1869, 

 p. 36. 



Reeve's B. spixii, cited here by Pfeiffer, is a very doubtful 

 synonym. If the original of his figure is normal, it indicates a new 

 species. From present information, it appears that Nyst was the 

 first to change the preoccupied name originally proposed by 

 Philippi. The strong, spaced folds of the earlier whorls are char- 

 acteristic. 



Var. unicolor Phil. Form normal, but without trace of the 

 bands. 



Hacienda of Huqribamba, east of Huancayo, Peru. 



S. ALUTACEUS Reeve. PL 23, fig. 61. 



Shell umbilicated, ovate-conic, solid, longitudinally plicate-striate, 

 subgranulated by spiral impressed lines. Blackish-chestnut, with 

 one white band ; spire conic, obtuse ; suture impressed, irregularly 

 crenated. Whorls 62, scarcely convex, the last shorter than spire, 

 base rounded. 



Aperture subvertical, angu late-oval ; peristome somewhat thick- 

 ened, the right margin slightly expanded, columellar margin much 

 dilated above, vaultingly reflexed. Alt. 35, diam. 13 ; aperture alt. 

 16, width 8 mill. (Pfr.). 



Cuzco, Peru (Lobb). 



Bui. alutaceus REEVE, P. Z. S. 1849, p. 99 ; Conch. Icon. 72, f. 

 522. PFR., Monogr. iii, p. 324. 



