294 ANTILLEAN LEPTINARIA. 



ovate, whitish-corneous, finely and weakly striatulate, spire 

 conic, the apex obtuse, whorls 5, convex, the last well rounded 

 peripherally and quite convex at the base. Suture narrow, 

 deeply impressed. Aperture slightly oblique, the outer lip 

 very slightly arched forward above. Columella very short, 

 vertical, very strongly truncate below, the truncation accen- 

 tuated by a low spiral lamella. Length 5.5, diam. 3, length 

 of aperture 3 mm. 



Jamaica. 



This form differs from L. monodon by the 'closure of the 

 umbilicus, which is complete in most specimens seen, tout in 

 a few there remains a minute chink behind the reflexed colu- 

 mellar lip. With the shape of L monodon, this form has the 

 coluniellar structure of L. pallida. 



3. L. PALLIDA (C. B. Adams). PI. 43, figs. 44, 45, 46, 47. 



Shell small, thin, diaphanous, corneous, elongate; whorls 

 5, convex; lip thin; coluniella straight. Divergence 35 de- 

 grees. Length of spire .16, total length .27, width .13 inch 

 [6.75x3.25 mm.] (Ad.). 



Jamaica (C. B. Adams). Westmoreland (Chitty in Swift 

 coll.). 



Bulimits pallidus C. B. AD., Synops. Conch. Jamaicensium 

 in Proc. Bost, So'C. Nat. Hist., ii, 1845, p. 12. PFR., Monogr., 

 ii, 161 ; vi, 100. Nameless in REEVE, Conch. Icon., v, Bulimus, 

 pi. 84, f. 120. 



This species differs from L. monodon by its more length- 

 ened, narrower spire, the sides diverging at an angle of about 

 35 degrees, while in L. monodon the angle is about 45 to 50 

 degrees. 



The type lot contains some specimens of the narrowly um- 

 bilicate form together with several typical L. pallida. There 

 are also in the Adams collection specimens from Westmore- 

 land, taken by E. Chitty, similar to those in the Swift collec- 

 tion from the same place and collector, fig. 45. These shells 

 are imperforate or very narrowly rimate, oblong-ovate, whit- 

 ish-corneous. Spire conic, much elevated, the summit obtuse. 

 Whorls 5 l / 2 to 6, convex, parted by a narrow, deeply im- 



