HELICINID A. 285 
Helicina substriata, Gray, in Zool. Journ. i. p. 66, t. 6, f. 4; Désh. 
an Lam. Hist. viii. p. 160, n.9; Sow. Thes. t..1, £.22; Pfr. Ic. 
n. 92, p. 67, t. 9, f. 30 (from Gray); Pneum. Mon. p. 391. 
Browne, Jamaic. t. 40, f.4; Cochlea, n, 14? 
Hab. West Indies. 
121. HELICINA CONVEXA. 
Shell convex-orbicular, solid, smooth, shining, white; spire vaulted, 
slightly mucronated; whorls 43, the last two moderately convex, 
last very indistinctly angulated, scarcely descending anteriorly ; 
aperture entire, oblique, semilunate ; columella shortly arcuate, 
dilated backwards into a thick callus of the same colour, peri- 
stome thickened, narrowly expanded, with the basal margin 
separated from the columella by a very slight notch. Height 
4}, greatest breadth 63, least br. 5} mill. 
Helicina convexa, Pfr. in Proc. Z. S. 1848, p. 120; Jc. n. 70, 
p: 53, t. 9, f. 9,10; Pneum. Mon. p. 391. 
Locality unknown. 
122. HEeLIcINA MINUTA. B. M. 
Shell conoidally-depressed, striated, red or straw-yellow; spire 
rather convex, slightly acuminated ; whorls 4, rather flat, the 
last somewhat descending, subangulated, nearly flat beneath ; 
aperture very oblique, triangular ; columella exceedingly short, 
simple, dilated backwards into a shining callus of the same 
colour ; peristome somewhat thickened, slightly expanded. Oper- 
culum thin, reddish. Height 23, greatest breadth 43, least br. 
33 mill. 
Helicina minuta, Sow. in Proc. Z. S. 1842, p. 7; Thes. n. 70, p. 13, 
t. 1, f. 40,41; Pfr. Ic. n. 71, p. 54, t. 4, f. 24-27; Pnewm. Mon. 
p. 391. 
Helicina discolor, Muhlf. MSS. in Anton, Verz. p. 53, n. 1938. 8. 
8. With the spire a little more raised. 
Helicina flammeata, Muhlf. MSS. in Anton, Verz. p. 58, n. 1938. 
Hab. The Islands of Opara and Cheatora. 
§ 11. Peristome not toothed, expanded; shell sharply keeled. 
123. HEeLICINA UNIFASCIATA. 
Shell rather depressed ovate, whitish, with a rather sharp keel- 
like ridge, and narrow brown band round the centre of the last 
whorl ; spirally rather rib-like striated, the stricee convex, rather 
distant; spire conical convex; beneath convex; peristome 
