PLEKOCHEILUS-EURYTUS. 91 



P. SUPERSTRIATUS Sowerby. PI. 36, fig. 80. 



Shell im perforate, ovate-conic, rather solid, shining, longitudinally 

 rugate, spirally striate ; chestnut, obscurely flammulate and maculate 

 with blackish-brown. Spire conic, apex rather acute; whorls 5, 

 slightly convex, crenulated at the suture, the last exceeding the spire, 

 sculptured with numerous incised spiral striae, disappearing toward 

 the base. Aperture oval, bluish-purple inside ; peristorae scarcely 

 thickened, buff. Alt. 54, diam. 29 mill. (Sowb.^. 



Yquitos, Peru. 



B. superstriatus Sows., P. Z. S., 1889, p. 578, pi. 56, f. 9. 



Resembling B. taylorianus Reeve, but spirally sculptured, thus pre- 

 senting a character quite unusual in the genus, and unknown among 

 the species of this group. 



Var. PRODEFLEXUS Pilsbry. PI. 36, fig. 81. 



Shell imperforate, ovate-conic, solid. Yellowish-chestnut, sprink- 

 led with golden dots and maculre, showing a few longitudinal dark 

 streaks and scattered spots ; the earlier whorls purplish-brown. Sur- 

 face with growth Avrinkles, irregularly cut into narrow vertical 

 granules by more distant spiral incised lines, subobsolete below. 

 Spire stout, conical ; apex obtuse. Whorls 4?, gently convex, the 

 last transversely dilated, compressed around the upper part, deeply 

 deflexed in front, slightly gibbous around columella. 



Aperture over half the shell's length, somewhat oblique, purplish 

 inside, ovate-angular; peristome blunt, not expanded, its edge 

 yellowish, broadly bordered inside with blue-white; columellar mar- 

 gin abruptly arcuate below, straightened above, oblique, passing into 

 parietal wall without an angle ; parietal callus narrow, extending low 

 on columella. Alt. 52, diam. 30 mill. ; alt. of aperture 28 mill. 



Balsas, valley of Mar anon R., Peru (H. W. Webb). 



Resembles Sowerby 's B. superstriatus (which I know from his de- 

 scription and figure only) in sculpture, but differs from his figure in 

 the stouter spire, and very different form of the columella. 



P. AUREONITENS Miller. PI. 38, fig. 5. 



Shell imperforate, ovate-conic, compressed, rather thin, smooth, 

 most minutely, closely granulated, partly (especially anteriorly on 

 penultimate whorl) spirally lineate; slightly golden-shining, rufous* 

 diaphanous ; ornamented with oblique darker streaks on penultimate 



