144 EOCENE MOLLUSCA. 
outer lip, which is smooth within, nearly straight, and without the posterior dilata- 
tion which characterises J/. ovulata. 
Locality.—Kstuary bed at Mead-end, near Hordwell. 
Stze.—Axis, rather more than 3-10ths of an inch; diameter, 2-10ths of an inch. 
No. 86. MARGINELLA vITTATA. JF. HL. Hdwards. Tab. XVIII, figs. 7 a—c. 
M. testa ovulata ; spird brevissimd, depressd: apertura elongata, mediocri, antice effusd, 
profunde emarginatd; labro incrassato, intis obsolete crenulato; columella quadriplicatd, plicis 
anterioribus fere equalibus. 
Shell ovate-oblong, with a very short, depressed, almost hidden spire: aperture 
long, moderately wide, curved at the posterior extremity, effuse in front, and deeply 
notched at the base; outer lip thickened along the outer margin, feebly crenulated 
within ; columella with three thickish, nearly equal folds in front, and an obscure one 
behind. 
Although nearly resembling J/. ovularis (Lamk.), this present species is easily 
distinguished from that by the general shape, which is shorter and broader, by the 
depressed spire, by the aperture, which is wider and without the contraction at the 
middle characteristic of the French species, and by the folds, which are not so numerous, 
and not quite so oblique. The narrower aperture, the smooth uncrenulate outer lip, 
the more numerous folds, and the greater size of J. semplex, separate that species 
from the present one. 
One of the specimens exhibits faint traces of several transverse bands, from 
which circumstance the specific name is taken; these bands are of a dark brown colour. 
Locality—Headon Hill. 
Size.—Axis, 3-10ths of an inch; diameter, rather more than half the length of the 
axis. 
Family—V OLUTIDE. 
Genus 23d. VouutTa. Lina. 1767. 
VouuTa, Scopoli, 1777. 
—  Bruguiere, 1792. 
— Lamarck, 1801. 
— Montfort, 1810. 
Musica, Humphreys, 1797. 
Puirsona, Bolten, 1798. 
Fureurarta, Schum., 1817. 
ScaPHELLA—HARPULA—VOLUTILITHES, Swainson, 1840. 
Gen. Char—Shell sub-ovate or elongately fusiform, more or less ventricose; volu- 
