BUCCINID^. i-66 



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. L. cingidata, 

 Lara, (xlviii, 9t). 



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 greatl}^ 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., 1811. Whorls rounded above, not shouldered. 

 L. smaragdula, Linn, (xlviii, 98). 



Genus Mazzalina, Conrad, appears to be very similar to 

 Lagena, Schum., if not identical with it. M. pyrula, Conrad 

 (xlviii, 100). Eocene; Alabama. 



Family BUCCINID^. 



Shell ovate, oblong or pear-shaped ; canal moderate or short, 

 columella without folds or plications. 



Operculum with terminal or lateral nucleus. 



Dentition I'l'l. The rhachidian tooth normally three- 

 ( sometimes as many as seven-) 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 Fusidge) into a canal ; but with 

 these have been more recently associated pyriform shells having 

 some resemblance to the latter family. Hemifusus, Melongena, 

 Sipho, etc., 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 Buccinidas approaching Fusiis there is the 

 general distinction that the canal, if long, is wide and open ; 



