BULIMULUS. 145 



long-conic, rather acute. Whorls 6, a little convex, the last shorter 

 than the spire, somewhat compressed at base. Columella twisted. 

 Aperture little oblique, subtetragonal oval, brownish inside ; peris- 

 tome thickened within, the margins subparallel, right margin sinu- 

 ous above, columellar margin overhanging, reflexed. Alt. 26, diam. 

 12 mill.; aperture 13 mill, long (Pfr.). Habitat unknown. 



Bulimus monilifer REEVE, Conch. Icon., pi. 48, f. 318 (Nov., 

 1848), not of Gould Bulimus indistinctus PFR., Zeitschr. f. Malak., 

 1852, p. 63. 



Reminds one of some forms of Bulimulus exilis (guadelupensis}. 

 The generic position of indistinctus is unknown. 



B. LUTEOLUS Ancey. 



Shell ovate-conoid, very thin, a little glossy, pale green or buff- 

 amber colored, slightly marked with close and obsolete growth-lines 

 visible only under a lens. Spire conic, the apex rather minute and 

 a little obtuse. Whorls 5, convex, regularly and rather rapidly in- 

 creasing ; suture simple, impressed; last whorl ovate, ample. Aper- 

 ture suboblique, about one-third the length of the shell, oval, angu- 

 late above ; peristome simple, unexpanded, acute, narrowly expanded 

 and reflexed in a triangle over the small umbilical chink ; margins 

 distant. Length 14, diam. 9, alt. aperture 7-J mill. (Anc.). 



Brazil : Goyaz. 



Bulimulus luteolus ANC., Le Nat., April 1, 1901, p. 82. 



" Seems allied to B. limpidus Drouet, of Guyana, by its general 

 form, but it has a narrow perforation, while limpidus is quite imper- 

 forate. Moreover, the embryonal whorls, viewed under the micro- 

 scope, are provided with very fine, undulating lines and scarcely vis- 

 ible spiral lines, while those of limpidus are finely and regularly re- 

 ticulate." 



B. STILBE n. sp. PI. 25, fig. 18. 



Shell very narrowly rimate, ovate-conic, thin and very fragile, of 

 a pale greenish-yellow tint, fading above, and with a few narrow 

 darker streaks; glossy, nearly smooth, the growth lines rather faint, 

 base showing extremely superficial, faint and fine spiral striae. 

 Whorls 5^, the first sculptured with interrupted and waved wrinkles 

 crossed by comparatively coarse and prominent spiral striae ; the rest 

 convex, last whorl moderately inflated. Aperture oblique, ovate, 

 the outer lip thin and fragile, columellar margin regularly concave, 



