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REPORT ON ZOOLOGY, MDCCCXLIl : 
only by the margin of the mouth not being thickened, and by the pre- 
sence of teeth on the columella, which are continued inwardly like 
lamellae. The animal seems to want an operculum. The two species are 
from Cuba. 0. depressa is low and has six whorls: 0. glohulosa is 
spherical, with five whorls : both have two lamellae on the columella. 
Helicina sagraiana, D’Orb., Cuv., is distinguished from H. major, 
Gray, by the thickened unreflexed margin of the mouth. H. variegata, 
marmorata, and lanieriana, appear to correspond with varieties of 
Pfeiffer’s species JT. adspersa. H.crassa; thick; spherical; streaked 
lengthways ; bay with white band ; the angle of columella toothed. 
H. zephirina ; spherico-conical ; smooth ; reddish ; labrum white. H. 
petitiana ; conical ; yellow ; furrowed across ; labrum white ; angle of 
columella sharp. H. Sloanii is H. conica, Pfr. H. conica ; trochi- 
form ; yellow ; smooth ; aperture triangular ; whorls keeled ; angle of 
columella plain, sub-dentated. H. trochulina; trochi-form ; smooth; 
angle of colmnella convex ; aperture semicircular. H. elegans appears 
to be II. rupestris, Pfr. H. elongata; elongato-conical ; smooth; above 
as it were hammered obliquely ; bright yellow. H. rotunda; spherical ; 
smooth ; rose coloured ; angle of columella emarginated. II. dentigera ; 
roundish ; depressed ; smooth ; white with a band ; angle of columella 
dentated, emarginated. H. minima; roundish; depressed; smooth; 
bright rose colour; less than the preceding. . H. glohulosa; spherical; 
smooth ; white with broad bands : all these are from Cuba. 
Sowerby enumerates more than seventy species in his monograph on 
the genus Helicina, 1. c., amongst which several are new. H. jamaic- 
ensis ; H. aurantice. Gray, simillima, sed t. magis conica et magis tenui ; 
peritremate pallidiore, minus incrassato. H. Brownii, t. globosa, tenui, 
anfr. ultimo magno ; apertura semilunari, labio externo reflexo, paulu- 
lum expanso, prope collumellam incisura elongata ; labio intemo prope 
collumellam subcalloso ; columella obliqua, acuta. H. lutea, t. globosa, 
subangulata, laevi ; labio externo paululum expanso, vix incrassato, labio 
interno leviter incrassato ; Antilles. H. antillarum, t. depressa, magna, 
tenui, leviter striata, anfractu ultimo magno, labio interno tenui, prope 
columellam paululum incrassato, columella rotundata, angusta, obtusissime 
angulata ; labio externo expanso, reflexo, postice subdepresso : Antilles. 
H. guadeloupensis (Zool. Pro. 1842, p. 7). H. maculata, t. trapezoi- 
dea, subangulata supra infraque conica, laevi, tenui, rubrofasciata et 
maculata, labio externo reflexo, subexpanso, ad basin columellae tenui, 
columella subcallosa, ad basin attenuata, operculo corneo : South America. 
H.polita (Zool. Proc. 1842). H. similis (Zool. Proc. 1842). H. parva 
(Zool Proc. 1842). II. maxima (Zool. Proc. 1842). H. pellucida ; H. 
zephyrina, Duel. ; similis, sed columella poene recta, subangulata ; Guiana. 
H. pyramidalis (H. conica, D’Orb.) H. angustissima {H. acutissima) 
(Zool. Proc. 1842). II. trochiformis, ib. II. aglutinans, ib. II. 
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