HELICINID &. 299 
Helicina Brownii, Gray, in Zool. Journ. i. p. 69, t. 6, f.13; Désh. 
in Lam. Hist. viii. p. 163, n. 17; Sow. Thes. n. 14, p. 4, t. 1, 
f.7,8; Pfr. Ic. n. 30, p. 28, t. 3, f. 18, t. 6, f. 21, 22. 
Helix Brownii, Wood, Ind. Suppl. t. 8, f. 63. 
Alcadia Brownei, Pfr. Pneum. Mon. p. 408. 
Cochlea, n. 11, Browne, Jamaic. t. 40, f. 1. 
Hab. Jamaica. 
8. ALCADIA CITRINOLABRIS. 
Shell depressed-globose, solid, faintly striated, red, covered with a 
minutely-hairy periostraca; spire broadly conoidal, rather 
pointed; whorls 5, slightly convex, last scarcely descending, mo- 
derately convex beneath; aperture very oblique, semiovate ; co- 
lumella short, terminating in a small, blunt, outward, promi- 
nent tooth, dilated backwards into a broad semicircular callus ; 
peristome thickened, reflexed, yellow, with the upper margin 
sinuate, basal margin separated from the columella by a short 
slit. Height 105, greatest breadth 16, least br. 13 mill. 
_ Helicina citrinolabris, Adams, Contrib. to Conch. u. 1, p. 14. 
Alcadia citrinolabris, Pfr. Pneum. Mon. p. 408. 
8. Smaller; with the spire less depressed, and a white peristome. 
Helicina albolabris, Adams, Contrib. to Conch. n. 1, p. 13. 
flab. Jamaica. 
9. AncaprA HoLuANDtI. 
Shell globose-conoidal, rather thin, dark chestnut-coloured, indis- 
tinctly decussated, covered with small pustules under a lens; 
spire broadly conoidal, rather pointed; whorls 5, slightly convex, 
increasing rapidly, the last somewhat descending anteriorly ; 
aperture diagonal, semiovate, rather triangular ; columella short, 
terminating forwards in a curved tooth, dilated backwards into 
a shining, semicircular callus; peristome simple, sharp, ex- 
panded, separated from the columella by a short slit. Opercu- 
lum solid, ovate, grayish. Height 83, greatest breadth 12, 
least br. 10 mill. 
Helicina Hollandi, Adams, Contrib. to Conchol. n.1, p. 13; Pfr. Ic. 
t. 10, f. 18-20. 
Alcadia Hollandi, Pfr. Pnewm. Mon. p. 409. 
Hab. Jamaica. 
10. ALGADIA SUCCINEA. 
Shell orbiculate-conoidal, thin, granulated under a lens, pellucid, 
shining, reddish-amber-coloured, furnished with several series 
of black hairs, which are obsolete except on the last whorl; 
