PROSOBRANCHIATA. 317 
No. 241. Preuvroroma zonutata. fF. #. Edwards. Tab. XXXII, fig. 6, a, 6. 
P. testa parvd, elongato-fusiformi, sub-turritd, omnino concentrice lineata : anfractibus 
depresso-convexis ; marginibus posticis sulcatis ; ultimo anfractu sub-conico, tn canali lato 
revi terminato; lineis concentricis crassiusculis, per-elevatis, sub-distantibus : .apertura 
ovali ; labro sub-recto, acuto, intis plicato ; sinu lato, profundo, sub-trigono, ad humerum 
collocato. 
Shell small, elongate, fusiform, and concentrically lined ; the spire is elevated, 
exceeding the aperture in length,and somewhat turreted; thewhorls are flatly convex, and 
furrowed round the posterior margins, the sutural edge of which is bordered by a single 
prominent line; the last whorl is nearly conical, and terminates, anteriorly, in a very 
wide, short, but distinct and oblique, canal ; the concentric lines are rather thick, much 
elevated, moderately distant, and nearly equal over the whole surface. The aperture 
is of a widely ovate form ; the outer lip nearly straight, thin and sharp on the edge, and 
plicated within ; the sinus is placed on the shoulder, and is very wide, deep, and sub- 
trigonal in shape, with a much-rounded apex ; and the columella is slightly twisted. 
A very pretty and somewhat rare shell, the prominent and nearly equal transverse 
lineation of which gives to it a screw-like appearance. It appears to be quite 
distinct. 
Size.—Axis, 4-]2ths of an inch; diameter, 1-8th of an inch. 
Localities. —Highcliff, Barton, Alum Bay (Stratum, No. 29, Prestw.) 
No. 242. Preurotoma conoipeEs. Solander.* Tab. XXXIII, fig. 5, a, 6. 
Murex conoiprs. Sol. 1766. Brand., Foss. Hanton, p. 14, fig. 17. 
— — Morr. 1854. Cat. Brit. Foss., p. 270. 
Non. Pxievurotoma conompEa. WNyst, 1843. Descr. des coq., &c., de Belg., p. 515, t. 40, fig. 9. 
P. testa utrinque sub-conicd, sub-turrita, longitudinaliter denticulato-plicatd, concentrice 
lineald: spird elevatd, acuminatd ; anfractibus ad humeros acute angulatis, marginibus 
posticis declivis, valde cavatis, ad suturam unicd lined, aliquando fastigitformi, aliquando 
* The descriptions of this and the following two species, P. biconus and P. helicoides, have, been, 
accidentally, misplaced; the species form part of the first section, in which the sinus is placed in the 
margin of the whorls. 
