62 BULIMULUS-SOUTH AMERICAN. 



apex obtuse. Whorls 7, a little convex, separated by a narrowly 

 channelled suture; the last whorl nearly -half the length of the 

 shell, slightly tapering at base. Aperture suboval, nearly vertical ; 

 columella rather straightened, reflexed, nearly covering the perfor- 

 ation ; peristome simple and acute. Alt. 21, diarn. 7 mill. (Sowb.~). 

 Bogota, U. S. of Colombia (Da Costa coll.). 



Bulimulus glandiniformis G. B. SOWERBY, P. Z. S., 1892, p. 297, 

 pi. 23, f. 13, 14. 



A transparent, fragile shell, with very much the appearance of a 

 Glandina (Sowb.*). It may prove to be a Drymceus. 



B. KREBSIANUS Pilsbry, n. sp. PI. 10, figs. 1, 2. 



Shell narrowly umbilicated, long, ovate-pyramidal, thin, but 

 rather solid ; white, faintly flesh-tinted toward the apex ; somewhat 

 shining. Smoothish, with slight growth- wrinkles, and on some 

 specimens excessively faint, close spiral strise on the spire. Spire 

 long-conic, the apex obtuse, nepionic whorls very shallowly, mi- 

 nutely zigzag-wrinkled and pitted. Whorls 7i-8, slightly convex, 

 the last rounded. 



Aperture ovate, slightly oblique, white inside, contained over 2 

 times in length of shell ; outer lip acute, unexpanded, regularly ar- 

 cuate ; basal lip narrowly arcuate ; columella concave below, 

 straightened above, its edge well reflexed above. Alt. 26, diam. 11, 

 alt. of aperture 9'8 mill. 



Carthagena, Colombia (Krebs). 



The white color is unusual in this subgenus, but the apical sculp- 

 ture shows it to belong here. The spire is unusually lengthened. 



B. FONTAINII (d'Orbigny). PI. 10, figs. 96, 97. 



Shell narrowly umbilicated, oblong-conic, rather solid, pellucid, 

 more or less shining, smooth ; corneous or greenish-corneous. Spire 

 ovate-conic, rather acute ; suture simple. Whorls 6-7, convex, 

 moderately increasing, the last not descending, somewhat com- 

 pressed at the umbilicus. Columella little oblique, lightly arcuate. 

 Aperture oval, colored like the outside, the base sometimes suban- 

 gular, about two-fifths the shell's length ; peristome simple, unex- 

 panded, acute, the margins converging, joined by a very delicate 

 callus ; right margin arcuate, columellar margin dilated above, 

 vaultingly reflexed. Alt. 13?, diam. 6 mill. (Hidalgo). 



Guayaquil, Ecuador, among plants (Fontaine, Paz and Martinez). 



