184 BULIMULUS-BOSTRYX-LISSOACME. 



Bulimus orophilus MOREL., Ser. Conch., iii, p. 189, pi. 9, f. 6 

 (1863). PFR., Monogr., vi, p. 137. HIDALGO, Mol. Viaje al Pacif., 

 p. 118; Journ. de Conch., 1870, p. 63. 



There are three color-forms ; unicolored white, longitudinally 

 striped with reddish, and banded with reddish or violaceous. 



Two Bulimi, stenaome Pfr. and nigropileatus Reeve (to which re- 

 conditus Reeve may be united as a variety), are extremely close allies 

 of B. orophilus. Although often banded, like nigropileatus, it never 

 has the apex colored like that. It is a more elongated shell, with 

 more acute spire, the aperture narrower, more oblique, the columellar 

 margin a little less dilated. B. stenacme differs in coloration, pro- 

 portions of aperture to spire, and the form of the aperture. 



Morelet's comparisons, the substance of which is given above, are 

 based upon the descriptions and figures of nigropileatus and sten- 

 acme, not on comparison of specimens. 



B. BALSANUS Morelet. PI. 50, fig. 62. 



Shell narrowly umbilicated, oblong-conic, delicate, costulate-stri- 

 ate, shining; whitish-fleshy, sparsely streaked with reddish toward 

 the base, and marked with a few blackish dots. Spire tapering, the 

 apex acute, deep reddish. Whorls 6, a little convex, the last a little 

 shorter than the spire. 



Aperture a little oblique, oblong oval, scorched-fulvous inside ; 

 peristome unexpanded, thin, the columellar margin dilated above, 

 reflexed. Alt. 19, diam. 8 mill. (Morel.'). 



Balsa de Cocharcas, Mountains of Peru ( Angrand). 



Bulimus balsanus MOREL., Ser. Conch., iii, p. 192, pi. 9, f. 8. 

 PFR., Monogr., vi, p. 138. 



Smaller than B. orophilus, less elongated, and with a shining sur- 

 face. The surface is engraved with oblique, visibly sinuous, spaced and 

 shallow striae, producing a more or less regular costulation, which dis- 

 appears on the latter moity of the last whorl, where it is ornamented 

 with very few, inconspicuous longitudinal reddish lines, as in the ma- 

 jority of the species of this group. Not one is banded. The apex is 

 corneous, glossy, bright red, sometimes brownish. The umbilicus is 

 a little narrower than in B. orophilus. It is dotted like B. orophilus. 



B. CEREICOLA Morelet. PI. 46, fig. 63. 



Shell scarcely perforated, oblong-conic, delicate, shining, costulate- 

 striate ; whitish, radiated with narrow tawny streaks, and marked 



