STROPHOCHEILUS-DRYPTUS. 41 



Aperture somewhat over half the shell's length, ovate, livid-bluish 

 within ; peristome white or fleshy-yellow edged, well expanded and 

 reflexed, moderately thick, columella with a very strong, obliquely 

 entering fold above. 



Alt. 96, diam. 53, alt. of aperture 53 mill. 



Alt. 88, diam. 51, alt. of aperture 50 mill. 



Alt. 108, diam. 50, alt, of aperture 56 mill. (Pfr.). 



Caracas, Venezuela. 



B. marmoratus DKR. in Phil., Abbild. u. Beschreib. i, p. 157, pi. 

 2, f. 1, 2 (October, 1844). PFR., Monogr. iv, p. 381. MARTENS, 

 Binnenmoll. Venez,, p. 15. B. pardalis var. PFR., Monogr. ii, p. 

 36 ; iii, p. 317. B. pardalis REEVE, Conch. Icon. pi. 24, f. 157. 



This species differs from S. venezuelensis only in the more or less 

 distinctly criss-cross pattern of the microscopic sculpture on the last 

 whorl, but so characteristic is this that I do not feel justified in unit- 

 ing the two species. The striping is sometimes very irregular and 

 zigzag, sometimes merely streaked ; and the size of the shell varies 

 considerably. 



8. VENEZUELENSIS Nyst. PI. 23, figs. 59, 60. 



Shell oblong-ovate, solid, perforated; rich chestnut brown, with 

 zebra-striping of yellow on next to the last whorl and the upper 

 part of last whorl, the earlier whorls dull reddish or purplish-brown 

 with a whitish sutural border. Surface with no malleation or spiral 

 cords, but showing some spiral zones or lines of short, close vertical 

 icrinkles, one always below suture. Some whorls of spire rib-striate. 

 Whorls 5. Surface showing under a lens, a minute, dense gran- 

 ulation, the granule* crowded, not in the lea*t arranged in any pat- 

 tern. 



Aperture a little exceeding half the shell's length, ovate, livid- 

 bluish within ; peristome broadly reflexed, white or yellowish, moder- 

 ately thick ; columella with a very strong, obliquely entering fold 

 above ; parietal callus rather thin and transparent. 



Alt. 85, diam. 46, alt. of aperture 45 mill. 



Alt. 89, diam. 50, alt. of aperture 48 mill. 



Alt. 83, diam. 49, alt. of aperture 45 mill. 



Alt. 88, diam. 46, alt, of aperture 48 mill. 



Cavern of Guacharos, Prov. Cumana (Funck) ; Puerto Cabello and 

 Caracas (Swift), Venezuela. 



