PROSOBRANCHIATA. 157 
Shell ovate, very ventricose, much attenuated and deeply notched in front; spire 
elevated ; apex pointed. The whorls, six or seven, longitudinally ribbed, transversely 
furrowed; ribs numerous and sharp in young specimens, more distant and rounded in 
mature shells, and crowned with a double row of erect, sharp, nearly equal spines; 
the furrows, which are rather distant and regular, extend up to the front row of spines, 
but in fully formed shells often become obliterated over the posterior part of the last 
whorl. A narrow flat border runs round the whorls between the suture and the second 
row of spines, and the space between the two rows is concave. The outer lip is thin, 
sharp, and quite smooth within; the inner lip is not much spread out, and does not 
extend backwards beyond the suture ; the columella, which is slightly curved, presents 
three folds. 
This shell so closely resembles V. So/andri that it may, perhaps with greater pro- 
priety, be regarded as a dwarf variety of that species, rather than as being distinct from 
it. It is, however, more ventricose, with a longer spire and more nearly equal spines ; 
the inner lip is less spread over the ventral surface of the body whorl, and the notch is 
not so deep. 
The species occurs in abundance at Highcliff, but in the specimens from that 
locality the spines are blunt, almost nodiform, and the furrows more numerous. The same 
variety occurs at Alum Bay, and occasionally, though rarely, at Barton. 
Size.—Axis, 1 and 2-10ths of an inch nearly; diameter, 7-10ths of an inch. 
Localities —Barton, Highcliff, Alum Bay (Strat. No. 29, Prestwich). 
No. 95. VotutTa reEcTICosTA. Sowerby. Tab. XX, fig. 3. 
Votuta rEcTIcosTA. Sow. 1850. Dixon's Geol., &c., of Suss., p. 188; t. 5, fig. 18. 
V. testé ovato-oblongd, costatd, transversim sulcatd, anticé subrostratd, parum emargi- 
natd ; spird mediocri apice acuto : anfractibus ventricosis, duplict serie spinarum coronatis ; 
spatio inter series spinarum concavo ; costis numerosis, rectis, tenuibus, primam seriem 
spinarum gerentibus ; labro tenut. 
Shell oval-oblong, ribbed, transversely furrowed ; spire moderately elevated, ter- 
minating in a small pointed apex ; whorls ventricose, contracted rather suddenly in 
front, so as to give a beak-like form to the base, crowned with two not very distant rows 
of short, erect, sharp spines ; ribs numerous, thin, straight, scarcely extendmg beyond 
the middle of the whorl, and each terminating in a spine; the margins of the whorls 
between the two rows of spines concave. The outer lip thin, sharp edged, and smooth 
within. The basal furrows are strongly marked, and extend higher up the whorl 
than is usually the case. The notch in front is not deep. 
The figure is taken from the original specimen described and figured by Mr. 
Sowerby; this specimen, which forms part of Mr. Dixon’s collection, is unfortunately 
somewhat crushed and distorted. No traces of the inner lip remain, and the aperture 
