BUCCINIDA, 133 
the plications more central, simply because the canal is more 
produced. 
The animals of most of the species that have been observed 
are of a dull red color. 
Leucozonia, Gray. 
Distr.—9 sp. W. Africa, W. Indies, Panama. JL. cingulata, 
Lam. (xlviii, 97). 
Shell oval, subglobose, shouldered ; spire moderate ; aperture 
oblong ; canal short; columella subflexuous, with small oblique, 
unequal plaits ; outer lip subacute, with a more or less prominent 
tooth or tubercle at the fore-part. 
The most prominent character of this genus, when present, is 
the tooth which arises from the fore-part of the outer lip. It 
varies greatly in its development in the different species. In L. 
cingulata, in which it is always present, it is long, curved and 
tusk-like,so that the species has been erroneously arranged with 
Monoceros, from which it is instantly distinguished by its claw- 
like operculum and columellar plaits. In the other species it is 
sometimes entirely absent in some specimens, whilst well devel- 
oped in others. There is usually a posterior subchannel to the 
aperture. The sculpture does not vary essentially from that of 
the species of Latirus, but the color is usually a chestnut-brown, 
the only ornamentation being lighter or darker revolving bands. 
Usually the species are prominently shouldered. 
LAGENA, Schum., 1817. Whorls rounded above, not shouldered. 
L. smaragdula, Linn. (xlviii, 98). 
Genus Mazzauina, Conrad, appears to be very similar to 
Lagena, Schum., if not identical with it. M. pyrula, Conrad 
(xlviii, 100). Eocene; Alabama. 
Famity BUCCINID &. 
Shell ovate, oblong or pear-shaped ; canal moderate or short, 
columella without folds or plications. 
Operculum with terminal or lateral nucleus. 
Dentition 11:1. The rhachidian tooth normally three- 
(sometimes as many asseven-) pronged, the laterals two- or three- 
pronged (x, 11, 12). 
The typical Buccinum is a rather thin ovate shell, uniform and 
dull in color, with the base of the aperture broadly notched 
instead of being prolonged (as in Fuside) into a canal; but with 
these have been more recently associated pyriform shells having 
some resemblance to the latter family. Hemifusus, Melongena, 
Sipho, ete., pretty well bridge the chasm between the two 
families as far as the general form of the shell is concerned, but 
in those species of Buccinide approaching Fusus there is the 
general distinction that the canal, if long, is wide and open; 
