70 PLEKOCHEILUS-EURYTUS. 



Of this division I have seen only P. speciosus. It may well be 

 questioned whether the group does not belong to Plekocheihis. 



P. SPECIOSUS Pfeiffer. PI. 30, figs. 27, 28. 



Shell narrowly perforate, ovate, rather solid, longitudinally pli- 

 cate, very minutely granulate and obliquely malleate ; olivaceous- 

 brown, with scattered reddish spots. Spire short, conic, rather 

 obtuse; suture subcrenulate, pale. Whorls 4, moderately convex, 

 the last forming nearly two-thirds of the alt. of shell, rounded at 

 base ; columella lightly folded, whitish. Aperture little oblique, 

 acuminate-oval, plicate within, and bluish, shining ; peristome 

 brown-orange, somewhat thickened throughout, expanded and re- 

 curved, the terminations joined by a transparent parietal callus ;. 

 columellar margin dilated. Alt. 58, diam. 30 mill. ; aperture, in- 

 side alt. 35, width 18J mill. (Pfr.). 



Sierra Nevada di Sta. Maria (Schlim), 



B. speciosus PFR., P. Z. S., 1854, p. 290 ; Novit. Conch., i, p. 14, 

 pi. 5, f. 1, 2; Monogr., iv, p. 377. DOHRN, Jahrb. D. M. Ges., ii, 

 1875, p. 304. Mouss., Malak. Bl., xvi, 1869, p. 173. 



Mousson records B. speciosus from the lower Magdalena Valley 

 (coll. by Wallis), and measuring 53 mill. alt. The single specimen 

 before me is from Pamplona, U. S. of Colombia. Dohrn report& 

 specimens lacking the color spots. 



P. PLECTOSTYLUS Pfeiffer. PL 32, figs. 44, 45. 



Shell subperforate, ovate-conic, solid, regularly and distinctly 

 granulated; deep chestnut, with short, white flames under the 

 suture. Spire conic, rather obtuse. Whorls 5, slightly convex, the 

 upper ones plicate-striate, the last whorl swollen, very obliquely de- 

 scending in front, about four-sevenths the shell's length. Columella 

 with a strong suboblique fold above. Aperture reversed-ear-shaped, 

 dull lilac inside, shining ; peristome expanded and reflexed through- 

 out, livid brown. Alt. 35, diam. 17 ; aperture, alt. 22, width of 

 cavity below the fold, 10 mill. (Pfr.) 



Chachopo, Prov. Merida, U. S. of Colombia (Funck). 



B. plectostylus PFR., Monogr., ii, p. 48 ; P. Z. S., 1847, p. 230. 

 PHIL., Abbild., iii, p. 36, pi. 8, f. 7. REEVE, C. Icon., pi. 42, f. 268, 

 DOHRN, Jahrb. D. M. GeselL, ii, 1875, p. 304. 



Dohrn found a more ventricose form in the collection made by 

 Wallis. He gives these measurements : 



