86 PLEKOCHEILUS-EURYTUS. 



narrowly reflexed, gently coin-arc, but little wider above, without 

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

 lus, broivn 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, 

 xvi, 1869, p. 173. 



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

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



P. .TIMENEZI Hidalgo. PI. 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 spots 

 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, 

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



