BULIMULUS-BOSTRYX-LISSOACME. 187 



umellar margin dilated, wide, reflexed. Columella rather straight- 

 ened. Alt. 18, diam. 6 mill. ; aperture 6? mill. long. (Pfr.). 



Between S. Fernando and Patipampa, Peru, 30 leagues east of 

 Huancayo, in " La Sierra" 



Bulimus monticola PHILIPPI, Malak. Bl., xvi, 1869, p. 33. PFR., 

 ibid., p. 88 ; Novit. Conch., iii, p. 470, pi. 102, f. 7, 8 ; Monogr., viii, 

 p. 172. Not B. monticola Roth, Mai. Bl., iii, 1856, p. 3. 



Very similar to the illustration of B. dendritw Morel., but that 

 species is said to be plicate-striate, and with a length of 20 mill, has 

 only 7 whorls. (Phil.}. 



B. BILINEATUS Sowerby. PI. 50, fig. 64. 



Shell narrowly umbilicate, oblong-conic, rather thin ; pale brown- 

 ish, with two darker brown spiral bands bounding a median white 

 band. Surface with indistinct fine growth-lines, and faint traces of 

 minute, close, spiral stride above. Spire slightly convex conic, the 

 apex smooth, obtuse, brownish. Whorls 6 -7, moderately convex. 



Aperture slightly over one third the total length, ovate, showing 

 the bands within. Outer lip arcuate, sharp. Columellar lip dilated 

 above. 



Alt. 13s, diam. 6; alt. of aperture 5 mill. (Specimen). 



Alt. 14, diam. 6* ; alt. of aperture 6 mill. (Pfr.}. 



Western U. S. of Colombia, and Island of St. Elena (Cumin g) ; 

 Las Cruces, Savane, near Manta, canton of Montecristi, prov. Manabi, 

 Ecuador (Cousin). 



Bulinu* bilineatus Sows., P. Z. S., 1833, p. 37; Conch. Illustr., 

 f. 29. Bulimus bilineatus DESH. in Lam., An. s. Vert., viii, p. 277. 

 PFR., Conchyl. Cab., p. 231, pi. 62, f. 31-33 ; Monogr., ii, 211 ; 

 vi, 132. Thaumastus bilineatus COUSIN, Bull. Soc. Zool. France, 

 xii, 1887, p. 223. 



As in B. *tri>itus, the young are angular at the periphery. The 

 small size and mouth, smoothish surface, and the coloration, distin- 

 guish the species. It extends further northward than any other 

 member of the subgenus. 



Group of B. apodemetes. 

 B. APODEMETES Orbigny. PI. 51, figs. 1, 2, 3, 4. 



Shell obliquely perforate or closed, ovate, thin, corneous with 

 oblique stripes of chestnut and opaque-white (sometimes lacking the 



