PROSOBRANCHIATA. 177 



A short variety, (fig. 6 b), is also found, in which the whorls are angulated at the 

 shoulder, the ribs are shorter, more numerous, and crowned with single, sharp, erect spines. 



Size. — Axis 4 inches ; diameter, 2 \ inches. 



Localities. — Bracklesham Bay. French .- Grignon, Courtagnon, Parnes (fide Desh.), 

 Hattencourt, Hermes (fide D'Orb.). Belgian : Brussels, Panisel, near Mons (fide Nyst). 



/Section B. {Pullus sub -papillary) continued. 



b. Shell fusiform ; inner lip narrow ; columellar plaits few. 



No. 115. Voluta uniplicata. Sowerby. Tab. XXIII, figs. 2 a — c. 



Voluta uniplicata. Sow. 1850. Dixon's Geol., &c, of Suss., pp. 107 and 188, t. 7, 

 figs. 45, 46. 

 — angusta. Sow. 1850. Idem., t. 7, fig. 37- 



V. testa fusiformi, obsolete cost aid, injuventd transversim tenuissime striata, ad basin 

 obscure sulcata, prof uncle emarginatd ; spird conicd, apice sub-papillari ; anfractibus de- 

 presso-convexiusculis, obtuse angidatis ; aperturd oblongo-ovali ; labro incrassato, intus lavi ; 

 labio angusto, crasso ; columella leviter arcuatd, uniplicata. 



Shell fusiform, faintly ribbed, obscurely sulcated towards the base, and deeply 

 notched in front ; spire elongated and nearly conical ; pullus sub-papillary : whorls 

 rather convex, flattened at the side, and obscurely angulated at the shoulder ; in the 

 young state they are ornamented with crowded, very fine, transverse stria?. The ribs 

 are prominent, thick, rounded, and produced nearly to the base ; but on the last two or 

 three whorls they become obsolete, and are replaced by a row of obscure, blunt tubercles 

 placed on the angle of the shoulder ; the transverse striation is also lost, and the body 

 whorl is smooth, except where the shallow, faint, basal furrows appear ; the aperture 

 is of a lengthened oval shape ; the outer lip thickened near the suture, rather sharp- 

 edged towards the front, and smooth within ; the inner lip narrow and thick ; the colu- 

 mella slightly curved, and furnished with one prominent fold, placed nearer to the 

 anterior extremity than is usually the case. 



Fig. 2 a is taken from the shell figured in Mr. Dixon's work (t. 7, fig. 37) as 

 V. angusta. 



This species, which appears to be well characterised, is not uncommon. 



Size. — Axis, 3 inches nearly ; diameter, 9-10ths of an inch. 



Locality. — Bracklesham Bay. 



•23 



