302 CATALOGUE OF PHANEROPNEUMONA. 
Helicina hispida, Pfr. in Wiegm. Arch. f. Nat. 1839, 1. p. 355; Sow. 
Thes. HAG, p. A; t.3, £112, 113; Pfr. se. n. SZ, omh, «tale 
f. 19-23. 
Helicina dentigera, Orbigny, Moll. Cub. i. p. 252, t. 21, f. 4-6; 
Sow. Thes. n. 15, p. 4, t. 3, f. 107, 108. 
Alcadia hispida, Pfr. Pnewm. Mon. p. 412. 
Hab. Cuba. Very frequent near Matanzas. 
16. ALCADIA MINIMA. 
Shell depressed, faintly striated, covered with very short deciduous 
hairs, fuscous-reddish ; spire short, conoidal; whorls 43, scarcely 
convex, enlarging gradually, last somewhat depressed, rather 
flat beneath; aperture oblique, semiovate; columella short, 
nearly perpendicular, terminating in a short, blunt tooth ; 
peristome simple, scarcely expanded ; basal margin nearly rec- 
tilinear, separated from the tooth of the columella by a minute 
slit ; basal callus extremely thin. Operculum rather membra- 
naceous, horn-coloured. Height 33, greatest breadth 43, least 
br. 4 mill. 
Helicina minima, Orbigny, Moll. Cub. i. p. 253, t. 21, f. 7-9; Sow. 
Thes. n. 17, p. 5, t. 3, f. 119; Pfr. Je. n. 33, p. 30, t. 3, f. 26=25, 
Alcadia minima, Pfr. Pneum. Mon. p. 412. 
Hab. Cuba. 
17. ALGADIA PUSILLA. 
Shell depressed-globular, brownish horn-colour, with exces- 
sively fine strie of growth; apex subacute; spire moderately 
elevated, with the outlines curvilinear ; whorls more than 4, a 
little convex, with a distinct suture; aperture rather large, 
well rounded in the right side, somewhat sinuate in the left 
side; labrum thin, moderately dilated, well reflected, with a 
deep curved incision, similar to that of H. palliata, and next 
below the columella, the end of which is sickle-shaped. This 
species is much less discoidal than H. macilenta. Mean diver- 
gence about 120°; height 0.16, greatest breadth 0.25, least br. 
0.2 inch. (Adams.) 
Helicina pusilla, Adams, Contrib. to Conch. n. 7, p. 101. 
Alcadia pusilla, Pfr. Pneum. Mon. p. 413. 
Hab. Jamaica. 
