PROSOBRANCHIATA. 171 
elevated than the others, except towards the base, where the more prominent lines 
are placed nearer to each other, and the intermediate ones become very faint or 
altogether obsolete.—Aperture of an oblong-oval form, rather deeply notched in front ; 
outer lip simple, sharp-edged and smooth within; inner lip very narrow, and thin ; 
columella nearly straight, and furnished with two oblique folds in front, and two or 
three slender, obscure ones behind. 
Brander’s specimen in the British Museum, is unfortunately mislaid, and I have not 
been able to refer to it; but, judging from the description and figure given in his 
* Fossilia Hantoniensia,’ the present Volute must be the true /. costata of Solander ; for 
the word zzermis, used by that naturalist in his description, cannot be applied to the 
shells, distinguished by the thick nodiform terminations of their ribs, which have been 
referred by Mr. Sowerby to that species. 
D’Orbigny (Prod. de Paléont., vol. ii, p. 852, No. 267) has recorded this Volute as 
identical with the Cochlea mixta of Chemnitz, (V. costaria, Lamk.); but in that species 
the shell is longer and narrower, the surface quite smooth, except at the base; and the 
columella curved and furnished with two folds only. The two shells appear to me to 
be quite distinct from each other. 
The shell from Bracklesham Bay figured in Mr. Dixon’s work (t. 5, fig. 24) as 
V. costata, is a specimen of V. Maga; and those from Dax and Saubrigues, which 
Grateloup has considered to be identical with Solander’s shell (fig. 45) appear to belong 
to a different species ; they are represented as sub-turreted, with numerous rounded 
ribs, and with many folds on the columella, extending nearly to the posterior extremity 
of the aperture. 
Size.—Axis, 2 inches nearly ; diameter, 8-10ths of an inch nearly. 
Locality.—Barton. 
No.110. Votura HuMEROSA. F. 2. Edwards. Tab. XXII, figs. 6 a, 6. 
VoLuta costata. Sow. 1821. Min. Con., vol. iii, p. 163; t. 290, figs. 2 and 4 (non fig. 1.) 
Testé ovato-fusiformi, sub-turritd, costatd, transversim tenuissime lineatd, ad basin 
profunde et late emarginatd ; spird productd, apice acuto: anfractibus sub-planis ; costis 
distantibus, crassis, rotundatis, postice nodigeris ; apertura ovato-rhomboidali, postice sub- 
canaliculatd ; labro incrassato, intus levi; labio angusio, crasso ; columelld flecuosd, bis 
vel ter plicata. 
Shell ovately fusiform, sub-turreted, longitudinally ribbed, transversely finely 
striated; the base deeply and widely notched, and much bent backwards; spire ele- 
vated, but shorter than the last whorl ; apex small, pointed: whorls five or six, exclu- 
sive of the embryonic whorls, very slightly convex, and flattened at the sides; ribs 
distant, broad, obtuse, reaching almost to the base, and at the posterior extremities 
