158 EOCENE MOLLUSCA. 
is filled with the matrix, so that the columellar folds cannot be seen. Mr. Sowerby, 
in his description, expressed an opinion that this shell might probably be the same - 
as V. ambigua (Lamk.) ; the two rows of spines and the hollow space between them, 
however, appear to distinguish it. I am more inclined to refer it to V. scalaris, 
or to regard it as a young shell of /”. solandri ; but the short spire, numerous straight 
ribs, and the deep basal furrows distinguish it apparently from the former; while 
these characters, as well as the general form of the shell, which is more ventricose and 
more contracted in front than in /. solandri, appear to separate it from the latter spe- 
cies. A young specimen from Stubbington, in M. D’Urban’s collection, presents the 
same characters as the one figured ; and additional specimens may establish the species ; 
in the meantime I retain it, but with some doubt. 
Size.-—Axis, 1 inch and 2-10ths; diameter, 6-10ths of an inch. 
Localities—Bracklesham Bay, Stubbington. 
No. 96. VonuTA susPENSA. Solander. Tab. XX, figs. 4 a—e. 
Murex suspensus. Soland. 1766. Brand. foss. Hanton., p. 32; t. 5, fig 70. 
VoLuta crENULATA. Webster. 1814. Geol. Trans., 1st series, vol. ii, p. 204. 
—  ampreua, VAR. Monstrosa. Sow. 1816. Min. Con., vol. ii, p. 31; t. 115, fig. 5. 
—  suspENSA. Sow. 1823. Min. Con., vol. iv, p. 137. 
V. testd ovato-oblongd, sub-turritd, costatd, transversim sulcatd, ad basin sub-productd, 
parum emarginatd ; spird elevatd, acuminata, canali lato, marginibus anfractuum repente 
inflevis septo, circumdatd : anfractibus sub-ventricosis, dentato-crenatis ; costis obscuris, dis- 
tantibus, und serie spinarum coronatis: apertura postice acute angulatd, antice coarctata ; 
labro simplici tenui; columella biplicatd. 
Shell oval-oblong, turreted, ribbed, transversely furrowed ; spire elevated, pointed ; 
whorls somewhat ventricose, the posterior margins suddenly bent inwards, forming 
round the spire a broad deep canal, bounded by a sharp denticulated ridge. The ribs, 
numerous in the young shells, but becoming more distant towards maturity, extend 
nearly to the base of the whorl, and terminate posteriorly in sharp, tooth-like spines. 
At the posterior extremities of the ribs, the whorl is depressed, and presents a narrow 
flat space, which forms, as it were, a platform from which the sharp ridge bounding 
the spiral canal rises. The furrows at the base are broad and rounded ; the others 
distant and angular. The aperture is contracted, and produced in front, wide in the 
middle, sharply angulated behind ; the outer lip thin and smooth within : the columella 
nearly straight, presenting two very unequal folds. 
This is the rarest of the Barton Volutes ; it may be readily distinguished by the 
broad deep channel which runs round the spire. 
Size.—Axis, 3 inches; diameter, | inch and 6-10ths. 
