32 STROPHOCHEILUS-BORUS. 



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

 ticulate suture and large umbilicus; S. capillaceus var. intertextus 

 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 a& 

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

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

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

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

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



Corumbd, prov. Mattogrosso, Brazil (coll. C. \V. 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-strise 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 thi& 

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

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

 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, diam. 43 ; apert. alt. 41, width 31, inside 24 mill. 



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

 mann). 



B. lichtensteini ALB., Malak. Bl., 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. 



