178 EOCENE MOLLUSCA. 
No. 116. VonuTa Muricina. Lamarck. Tab. XXIII, figs. 1 a—e. 
Lister. 1685. Hist. Conchyl., t. 1033, fig. 6? 
Favanne. 1780. D’Argeny. Conchyl. (3d edit.), t. 66, fig. 1. 
CocuLea MIxTa? Chemn. 1795. Conchyl. cab., vol. xi, t. 212, figs. 3010—3011. 
VoLuTa murRicINA. Lamk. 1816. Tableau Encyclop. et méth., t. 383, fig. 1 a—é. 
—_— — — 1802. Ann. du Mus., vol. i, p. 477, No. 4; vol. xvii, p. 75, No. 5. 
— — — 1822. Hist. nat., &., vol. vii, p. 350, No. 5 
— — Defr. 1829. Dict. des Sci. nat., vol. lviii, p. 475. 
— — Desh. 1833. Encyl. méth. (Vers), vol. iii, p. 1144, No. 24. 
— — — 1824—37. Deser. des Coq. foss., &c., vol. ii, p. 697; t. 91, 
figs. 183—19; t. 93, figs. 3—4; t. 94, figs. 3—4. 
a= — Sow. 1844. Min. Con., vol. vii, p. 31; t. 626, figs. 4—6. 
a — — 1850. Dixon’s Geol., &c., of Suss., p. 107; t. 5, fig. 20. 
V. testa ovato-fusiformi, ad basin sub-productd, late emarginatd, antice levi, postice 
longitudinaliter tuberculato-costatd ; spird elongatd, apice obtuso: anfractibus angulatis, 
in juventd tenuissime transversim striatis, ultimo anfractu spiram in longitudine vie super- 
anti: aperturd oblongo-ovatd ; labro simplict; labio angusto; columelld ter vel quater 
plicatd, inter plicas anteriores sulco lato exaratd. 
‘Shell ovately fusiform, produced, and widely, but not deeply, notched at the Bice: ; 
spire long and pointed, with a sub-papillary apex ; whorls six or seven, obscurely fur- 
rowed at the base, smooth elsewhere, wide and angulated at the shoulder, crowned 
with a single row of pointed, pyramidal tubercles, having their bases prolonged into 
obtuse ribs, which are lost about the middle of the whorl; the last whorl is conical, 
and rather longer than the spire. In the immature shell the whorls are ornamented 
with numerous, very slender, transverse striz, which are lost as the shell approaches 
maturity. The aperture is of an oblong oval shape; outer lip rather thick, with a 
blunt margin ; inner lip narrow, thickened; columella round, curved, furnished with 
one large, prominent fold in front, and two or three smaller folds behind, and deeply 
furrowed between the two front folds. 
The ribs sometimes, particularly in young specimens, extend far down the 
whorl, almost to the base, and the tubercles are rounded: specimens also occur which 
are narrower, and more slender than the typical form; and, again, others are found 
wider and shorter, according to the condition of the ribs. Indeed, as both M. Deshayes 
and Mr. Sowerby have remarked, the shell is so variable in this respect, as to render it 
difficult to define. The transverse striation is found as well on the French as on the 
English shells, although that character is not noticed either by Lamarck or Deshayes. 
Size.—Axis, 3 inches and 4-10ths ; diameter, 1 inch and 6-10ths. 
Localities —Bracklesham Bay. French: Grignon, Parnes, Mouchy, Courtagnon 
(fide Desh.), Chaumont (fide D’Orb.). 
