PROSOBRANCHIATA. 163 



Strombus spinosus. Chemn. 1795. Conchyl. cab., vol. xi, t. 212, figs. 3002 — 3. 

 Voluta spinosa. Lam. 1802. Ann. du Mus., vol. i, p. 477, No. 2, and vol. xvii, p. 74, 

 No. 2. 



— — Roissy. 1804. Buff. Moll., vol. v, p. 440, No. 7. 



— Lam. 1816. Tableau Encyclop. et M&h., t. 392, fig. 5 a— b. 



— — — 1822. Hist. Nat., vol. vii, p. 348, No. 2. 



— — Be France. 1829. Diet, des Sci. Nat., vol. lviii, p. 474. 



— — Desk. 1832. Encycl. Method. (Vers), vol. iii, p. 1143, No. 22. 



— — — 1824—37. Desc. des Coq. Foss., vol. ii, p. 690 ; t. 92, figs. 7-8. 



— — 1 Galeotti. 1837. Me'm. sur la Const. Geog., &c, de Brabant, p. 149, 



No. 71, t.iii, fig. 16. 



— — 1 Nyst. 1843. Coq., &c., de Belg., p. 589. 

 _ _ Morris. 1843. Cat. Brit. Foss., p. 168. 



— IPhilippi. 1851. Palseontogr. Tert. Foss. Magdeb., p. 78, No. 169. 

 Nee. — — Sow. 1816. Min. Con., vol. ii, p. 30; t. 115, figs. 2—4. 



nee. — — — 1850. Dixon's Geol., &c., of Suss., p. 107; t. 5, fig. 16. 



nee. — — var. Platyspina. Sow. 1850. Dixon's Geol., &c., of Suss., p. 107; t. 5, 



fig. 29. 



V. testa turbinatd, ad basin transversim striata, longitudinaliter partim costatd j anfrac- 

 tibus acute a::gulatis, unicd serie spinarum coronatis ; spira brevi, apice acuto ; labro tenui, 

 simplici ; columella quadri-plicaid. 



Shell turbinate, resembling in shape two unequal cones placed base to base, the 

 smaller of which is formed by the short pointed spire ; whorls nearly straight, longitu- 

 dinally ribbed, much narrowed in front, and acutely angulated at the shoulder ; the 

 margin between the spines and the suture rather concave. The ribs, which extend 

 only about half-way over the whorl, terminate at the shoulder in a row of short, 

 pointed spines. The sutural margin is bordered by an elevated line, which, occa- 

 sionally, in young shells, rises into small, pointed tubercles opposite to the spines. The 

 whorls at the base are traversed by several oblique furrows, which disappear towards 

 the middle of the shell, where the ribs take their rise. The mouth is narrow, and 

 somewhat quadrilateral, owing to the angularity of the upper part of the whorl ; the 

 outer lip thin and smooth within ; inner lip but little spread out. The columella, 

 which is rather flattened in front and nearly straight, presents one large prominent 

 plait in front, and three, sometimes four, feeble ones behind and, according to 

 M. Deshayes, a large smooth callus at the posterior extremity formed by the thickening 

 of the inner lip. 



The shells from Barton, described by Mr. Sowerby (loc. cit.), and referred by him 

 to this species, present characters sufficiently distinct, as I have before observed, to 

 require that they should be separated. I have not met, in fact, with any shell from the 

 Hampshire beds corresponding with the true V. spinosa of the Paris basin, unless the 

 V. depauperata be regarded as a local variety ; but the species occurs not unfrequently 

 at Bracklesham Bay. 



