32 STROrHOCHEFLUS-BORUS. 



It seems to differ from the variety following in the distinctly den- 

 ticulate suture and large umbilicus; S. capillaceus var. intertc.rttt* 

 having the suture non-denticulate and the umbilicus a mere chink. 

 In the typical S. capillaceus there is usually a narrow chink only, 

 but sometimes a distinct umbilical cavity. It is rather doubtful 

 whether seneri and intertextus are true geographic races or only ex- 

 treme specimens of an everywhere variable species. 



Var. INTERTEXTUS Pilsbry (n. v.). PI. 17, figs. 30, 31. 



Shell with the size, blunt apex and sculpture of earlier whorls as 

 in capillaceus, but heavier, last whorl with the wrinkle-strife ana- 

 stomosing to form long, narrow diamond-shaped pits. Aperture 

 rounder, the lip much thickened ; parietal callus very heavy, and 

 with the entire peristorne of a bright rose-color ; interior of mouth 

 whitish. Alt. 64, diam. 41 ; apert. alt. 35 mill. 



Corumbd, prov. Mattogrosso, Brazil (coll. C. "VV. Johnson). 



Somewhat analogous to the var. crassus of S. oblongus. 



S. LICHTENSTEINI Albers. PI. 11, figs. 55, 56. 



Upper whorls just as in B. oblongus ; third whorl and those fol- 

 lowing uniform brown-yellow, the fold-stria? gradually becoming 

 more irregular, on the penultimate and last whorls broken into 

 hammer-stroke like impressions in places; cuticle mostly well pre- 

 served ; all whorls more swollen than in B. oblongus, especially the 

 last, while the general form is more conical. The ante-penultimate 

 whorl is more strongly convex, the penult, more flattened, and this 

 gives the shell a peculiar aspect. Aperture broad-oval ; peristome 

 but little reflexed, and only very moderately thickened, pure ivhite ; 

 columellar margin thin, forming a regular bow from basal to parie- 

 tal margin, imperceptibly passing into the latter; parietal callus 

 whitish, rather thin, with definite edge, and not very broad. 

 (Mart.) 



Alt. 73, diam. 46 ; apert. alt. 40, width 29, inside 22 mill. 



Alt. 70, diarn. 43 ; apert. alt. 41, width 31, inside 24 mill. 



Upper Maranon River (Warscewicz) ; Guajango, Peru (Stoltz- 

 mann). 



11. lichtensteini ALB., Malak. HI., i, 1854, p. 216. PFR., Novit. 

 Conch., i, pi. 9, f. 1,2; Monogr., iv, p. 336. MARTENS, Novit, 

 Conch, v, p. 20. LUBOMIRSKI, P. Z. S, 1879, p. 721. 



