BULIMULUS-ANTILLEAN. 49 



Bulimulus fuscus GUILDING, Zool. Journ. iv, p. 170 (insufficient 

 description). Bulimus barbadensis PFR., P. Z. S., 1852, p. 61 ; 

 Monogr., iii, p. 435. B. tenuissimus Fer., SMITH, Ann. Mag. N. H. 

 (6), viii, p. 252 ; Proc. Malac. Soc. i, p. 316. 



Several trays of this species before me, part collected by Thomas 

 Bland, agree well in characters, though some are slightly stouter 

 than others. It is larger than B. houelmontensis, with more straightly 

 conic spire. In B. semicinctus, also closely allied, the periphery is 

 subangular in front and begirt with a pale band, the aperture is 

 larger, outer lip somewhat sinuous with everted edge, etc. Evidence 

 that this species occurs on the mainland is still lacking. 



Whether Ferussac's B. tenuissimus was the Barbados shell with a 

 wrong locality label is doubtful ; I am disposed to consider it a conti- 

 nental form ; but it must freely be granted that the identification of 

 these thin brown and corneous Bulimuli is an excessively difficult 

 task, and almost impossible when the localities of the species or 

 specimens are unknown. The first description of tenuissimus per- 

 tained to the Brazilian shell so called by d'Orbigny, and it is to this 

 form that the name must belong. 



B. STENOGYROIDES Guppy. Unfigured. 



Shell rimate, turrited, elongate cylindrical, scarcely shining, 

 whitish-horn colored under a brown epidermis, stria? of growth some- 

 what sinuate; whorls (? about 5 or 6), little convex, the last nar- 

 row and forming half or more of the length of the shell. Aperture 

 long-oval, narrow, rather produced anteriorly ; peristome simple, 

 a little effuse anteriorly, acute, the margins joined by a thin callus; 

 columella reflexed over the narrow umbilical fissure. 



Alt. ? , diam. 5* mill.; alt. of aperture, 6 ; width, 2* mill. ; alt of 

 last whorl, 10 mill. (Guppy). 



Island of Dominica (Guppy). 



Bulimulus stenogyroides GUPPY, Ann. Mag., N. H. (4), i, 1868, p. 

 431. B. (Peronceus) stenogyroides SMITH, Ann. Mag. N. H. (6), ii, 

 p. 231. Bulimus stenogyroides Pfr., Monogr., viii, p. 132. 



Pfeiffer and Smith add nothing to Guppy's description of a single 

 broken specimen, by which alone the species is thus far known. It 

 probably belongs to the Stenogyroid series. 



B. SEPULCRALIS Poey. PI. 12, fig. 62. 



Shell narrowly umbilicated, oblong-conic, thin ; smooth, with 

 slight growth-wrinkles but no spiral stride. Brownish-corneous, 

 4 



