26 STROPHOCHEILUS-BORUS. 



are before me, showing practically the same characters, except in 

 color, as S. ovatus. The striping of these is like S. gummatus Hid., 

 but the form of the mouth is exactly as in ovatus, not obtuse below 

 as Hidalgo's species is. 



S. GRANDIS Martens. PI. 13, fig. 68. 



Shell imperforate, ovate-oblong, subrugose-striate, somewhat shin- 

 ing; tawny-chestnut, paler at the suture. Whorls 6, slightly con- 

 vex, the first small, white, with impressed points, second and third 

 sculptured with rather remote strong perpendicular ribs, chocolate- 

 brown, white at the suture ; the last whorl deeply descending in 

 front, convex at the base. Aperture trapezoidal-oblong, subvertical, 

 flesh-whitish inside ; peristome thickened, narrowly reflexed, bright 

 rose color ; outer margin receding above; columellar margin per- 

 pendicular, whitish above; parietal callus thin, whitish. Alt. 153, 

 greater diam. 83, lesser 62 mill. ; aperture, length including per- 

 istome 92, breadth 45 mill. (Mart.}. 



Descalvado, Prov. Mattogrosso, Brazil (Rohde), 



B. grandis MARTENS, Sitzungsberichte naturforsch. Freuude in 

 Berlin, 1885, p. 148; Conchol. Mittheil. iii, p. 9, pi. 39. 



This species is nearly allied to B. ovatus in characters of aperture 

 and upper whorls, but differs much in the general contour, the last 

 whorl embracing a much smaller portion of the preceding, is of less 

 circumference, and falls more toward the mouth. In consequence, 

 the aperture is notably longer and in comparison narrower ; the 

 outer lip for two-thirds of its length slopes outward, while in B. 

 ovatus only the upper third so slopes, the rest falling vertically ; the 

 thickening in the middle of the outer lip usually seen in ovatus is 

 lacking also. The columellar margin is decidedly longer and almost 

 straight. As only one specimen was secured, it may be only an in- 

 dividual variation of ovatus; but it is more likely to prove to be 

 geographically sundered, as no true ovatus is yet known from this 

 Province. (Marf) 



S. AURITUS Sowerby. PI. 12, fig. 62; pi. 16. fig. 26. 



Shell subimperforate, ovate, solid, rugose-Rtriate, under a lens 

 most minutely granulated ; brown-olivaceous ; spire convex-conic, 

 rather obtuse. Whorls 5, the upper closely striate, rather flattened, 

 the last two swollen, closely plicate at sutures, the last whorl slightly 

 shorter than the spire, subcompressed at base ; columella somewhat 



