HELICINID 2. 297 
middle and lower parts of the last whorl, with the strie of 
growth lightly impressed; apex rather obtuse, slightly mucro- 
nate; spire with the outlines much curved; whorls nearly 5, 
slightly planulate, with a well-impressed suture ; aperture rather 
large, semi-elliptical; lip rather thin and sharp, but well-re- 
flected so as to form a canal behind, with the slit not very deep, 
but wide. Mean divergence 110°, greatest breadth 0.59, least 
br. 0.48, height 0.4 inch. (Adams.) 
Helicina hirsuta, Adams, in Ann. Lyc. New York, v. p. 49, et 
Contrib. to Conchol. n. 8, p. 133. 
Alcadia hirsuta, Pfr. Pneum. Mon. p. 405. 
Hab. Jamaica. 
3. ALCADIA CONSANGUINEA. 
Shell subglobose, moderately thick, dark brownish-red, with the 
lip white, with a somewhat hirsute epidermis, having the pro- 
jecting points spirally arranged, with the strie of growth quite 
distinct; apex obtuse; spire with the outlines much curved; 
whorls 5, moderately convex, with a well-impressed suture; 
aperture semiorbicular ; lip sinuous above, moderately thickened 
and sharp, but well reflected, except at the extremities, with 
the slit broad and shallow. Mean divergence 110°, greatest 
breadth 0.6, least br. 0.5, height 0.45 inch. (Adams.) 
Helicina consanguinea, Adams, in Ann. Lyc. New York, v. p. 50; 
Contr. to Conch. nu. 8, p. 134. 
Alcadia consanguinea, Pfr. Pnewm. Mon. p. 406. 
Hab. Westmoreland, west part of Jamaica. 
4. ALCADIA MICROSTOMA. 
Shell globose-conic, moderately thickened, brown, shaded off to a 
snowy white along the suture and on the periphery of the last 
whorl, with rather light strize of growth, in which are a few 
spiral series of punctures; apex obtuse; spire with the outlines 
more or less and not uniformly curvilinear; whorls rather less 
than 5, moderately convex, with a well-impressed suture; last 
whorl subplanulate beneath; aperture semi-elliptical, com- 
pressed above and below, laterally dilated, with the lip sinuate, 
well expanded and reflected except at the extremities, with 
the slit not very deep, rather wide. Mean divergence 60°, 
greatest breadth 0.65, least br. 0.52, height 0.4 inch. (Adams.) 
Helicina microstoma, Adams, in Ann. Lyc. New York, v. p. 51; 
Contrib. to Conch. n. 8, p. 135. 
Aleadia microstoma, Pfr. Pneum. Mon. p. 406. 
Hab. Jamaica. 
