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.). 



Bulimulm glandiniformis G. B. SOWEEBY, 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 Drymwus. 



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



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

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

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

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

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

 nutely zigzag-wrinkled and pitted. Whorls 7J-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 J, diam. 6 mill. (Hidalgo). 



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



