266 EOCENE MOLLUSCA. 
Shell slender, fusiform, longitudinally ribbed, and concentrically furrowed ; spire 
pointed, elevated, forming rather more than half of the whole shell; whorls, six or 
seven, flatly convex; slightly thickened at the posterior edge, and bordered by a 
spiral, sharp, elevated, ridge-like line, which runs round the sutural margin, the 
space between which and the shoulder presents a deep, round furrow, obliquely 
plicated by the successive margins of the sinus. The longitudinal ribs are numerous, 
oblique, rounded, and very short, barely extending to the middle of the whorl, 
and frequently altogether lost on the last whorl; the spiral furrows are regular, 
moderately distant, and rather deep. The aperture is of a lengthened, ovate form, 
and terminates in front in a short, but distinct, and moderately wide, canal ; the sinus 
is somewhat three-cornered in shape, wide, but not very deep, and placed in the 
margin. 
Size.—Axis, 3-10ths of an inch ; diameter, 1-Sth of an inch. 
Localities.—Headon Hill, Colwell Bay, Hordwell (Upper Marine formation), 
Lyndhurst ; and Whitecliff Bay (fide Forbes). 
No. 188. Pxiruroroma vicina. F. #. Edwards. Tab. XXIX, fig. 10, a, 4. 
P. testa parva, politd, gracili, fusiformi, omnino concentrice crebri-sulcatd: spird 
sub-conicd: anfractibus planulato-convexis, in juventd costellatis et sub-angulatis ; mar- 
ginibus posticis declivis, viv cavatis, plicatis, unicd lined elevatd prope suturam cinctis : 
apertura angustd, ovali, antice in canali brevi, lato exeunti; labro acuto, arcuato ; sinu 
lato, sub-trigono, anticd in margine collocato. 
Shell small, polished, slender, fusiform, ornamented with numerous, close-set, 
shallow furrows: the spire elevated, forming rather more than half of the shell ; 
the whorls, six or seven, very slightly convex; the posterior margins, which slope 
gently backwards, are nearly straight, giving a sub-conical shape to the spire, and are 
girt round the suture by a single elevated, ridge-like line, in front of which appears a 
series of numerous curved plications formed by the successive margins of the sinus. 
The early whorls are obliquely ribbed and slightly angulated at the shoulders, but 
both these characters disappear as the shell approaches maturity. The aperture 
is of a narrow, oval shape, and terminates in front in a short, wide canal; the outer 
lip is sharp on the edge, arched, projecting most towards the anterior extremity ; and 
the sinus, which is wide, moderately deep, and sub-trigonal in form, is placed in the 
very front of the margin. 
This shell very closely resembles P. H[eadonensis, of which it may perhaps prove 
to be merely a variety. It is distinguished by the more slender form, the shorter 
spire, the more closely furrowed and less convex whorls, the absence of the costellz, 
