102 BRACHYPODELLA, JAMAICAN. 



truncate, with loss of ? whorls ; whorls left, fourteen, much 

 flattened, but with a well-impressed suture. Last whorl much 

 produced, obliquely. Aperture sharply angular on the right 

 side, and rounded on the left; so that when the shell is held 

 with the apex to the right, the aperture is like a tunnel or 

 archway. Lip reflected, but little thickened, shining. Length 

 .71, greatest breadth .14, least breadth, at apex, .07 " (Chitty). 



Western Jamaica: Retrieve, Westmoreland (Chitty). 



Cyl. pearmanceana CHITTY, Contrib. to Conch., i, p. 6 (Oct., 

 1853). PFR., Monogr., iv, p. 703. 



At present a rare species in collections. It is related to B. 

 alba, but readily known by the greater calibre of the cylinder 

 and the shorter keel, which is developed only on the straight- 

 ened latter part of the last whorl; moreover, the internal 

 pillar is stouter in the lower half of the shell, wound about 

 with two stout spiral ridges, and in some whorls a weak 

 median cord. The last whorl is swollen at the periphery, as 

 usual in the group, and rounded above and on the axial side. 

 The shell figured measures 18 x 3.5 mm., and has 13% whorls. 

 Chitty 's type measured 17.75x3.5 mm., with 14 whorls. It 

 must be close to B. alabastrina Pfr., if not, as I suspect, 

 actually identical with it. 



48. B. ALBA (C. B. Adams). 



" Shell subfusiform, widest above the middle; pure white; 

 striae scarcely visible under a common magnifier, except on the 

 last two whorls; the last whorl is sharply carinate anteriorly, 

 rather obtusely carinate just above the middle; spire with 

 rectilinear outlines; apex truncate, with the loss of thirteen 

 or fourteen whorls, the upper part of the spire before trunca- 

 tion being very long and slender ; thirteen or fourteen whorls 

 remaining, slightly convex, with a well-impressed suture ; last 

 whorl much produced obliquely; apex sharply angular an- 

 teriorly, obtusely so on the right, in the rest well rounded ; lip 

 moderately thickened, reflected nearly into the plane of the 

 aperture, shining, sharp, rather narrow. Length .4 inch, 

 breadth .083 inch " (Ad.}. 



Jamaica. 



