86 PLEKOCHEILUS-EURYTUS. 



narrowly reflexed, gently concave, but little wider above, without 

 noticeable fold, and together with the moderately strong parietal cal- 

 lus, brown throughout. Alt. 66, diam. 45 ; aperture, alt. 44, width 

 30 mill. 



U. S. of Colombia, Vegas of the River Quenden (Pfr.) ; near 

 Fresno and Santa Ana (Bid.) ; Upper Magdalena Valley, common 

 (Dohrn). 



B. castaneus PFR., P. Z. S., 1845, p. 68 ; Monogr., ii, p. 52. Rve., 

 C. Icon., pi. 32, f. 197. BLAND, in C. B. Ad. Contrib. to Conch., No. 

 11, p. 229. DOHRN, Jahrb. D. M. Ges., ii, 1875, p. 301. MOUSSON, 

 Malak. Bl., xxi, p. 4. DESK, in Fer., Hist., p. 53, pi. 130, f. 1, 2. 



Well distinguished from other species of this group by the non- 

 granulate surface. 



P. ELAEODES Pfeiffer. PI. 35, figs. 71, 72. 



Shell imperforate, ovate, rather thin, rugose-striate, transversely 

 submalleated, diaphanous, shining; chestnut-olivaceous. Spire 

 conoidal, the apex obtuse. Whorls 4, slightly convex, the last 

 about four-sevenths the total length, descending in front, rather 

 rounded beneath. Columella entering, somewhat twisted, roseate ; 

 aperture subvertical, oval, pearly within ; peristome roseate, some- 

 what thickened, narrowly reflexed, the ends joined by a callus 

 spreading over the umbilical region. Alt. 36, diam. 18 mill. ; aper- 

 ture measured inside, alt. 19, width 11 mill. (Pfr.). 



Andes of Columbia (Cuming coll.); Lower Magdalena Valley 

 (Wallis). 



B. elaeodes PFR., P. Z. S., 1851, p. 256; Monogr., iii, p. 305; 

 Conchylien Cabinet, p. 87, pi. 30, f. 23, 24. MOUSSON, Malak. Bl. r 

 xvi, 1869, p. 173. 



Distinguished, says Mousson, by its very strong, irregular spiral 

 grooving. Upper whorls lighter and showing zig-zag streaks. 



P. JIMENEZI Hidalgo. PL 35, figs. 69, 70. 



Shell subimperforate, ovate-acuminate, thin, subpellucid, not 

 shining. Surface striatulate and under a lens very minutely granu- 

 lated ; whitish, more or less copiously besprinkled with small spot& 

 and dots of chestnut, sparse or confluent, and partly obliquely elon- 

 gated, covered with an olivaceous cuticle. Spire short, conic, the 

 apex rather acute and chestnut-brown ; suture simple ; whorls 5 r 

 rather flattened, rapidly enlarging, the last large, ventricose, ob- 



