272 EOCENE MOLLUSCA. 
convexiusculis, postice concavis, oblique plicatis ; ultimo anfractu antice in canalem rectum, 
prelongum producto ; costellis numerosis, rotundatis, brevibus ; lineis transversis confertis, 
supra partes anticas et medianas anfractium inequalibus, supra margines posticas tenuibus, 
regularibus : apertura obovatd : labro leviter arcuato in margine late sinuato. 
Shell long, fusiform, somewhat turreted, ribbed, and ornamented with concentric, 
raised lines, which cover the whole surface. The spire is pointed and short, scarcely 
exceeding one third of the whole length of the shell, The whorls are slightly convex, 
and bear on the shoulders a single row of rather closely set, short, oblique ribs, 
rounded on the upper surface, and separated by concave spaces as wide as the ribs ; 
the posterior margins are broadly furrowed, and present a series of fine, curved 
plications, caused by the successive margins of the sinus; the last whorl is much 
contracted in front, and produced into a very long, straight canal. The transverse 
lines over the front and middle parts of the whorls are close-set, prominent, 
unequal, thickish, thread-like lines alternating with slender ones; over the posterior 
margins the concentric lines are very fine, numerous, equal, and granulated by the 
marginal plications. The aperture is of an oblong-oval form; the outer lip but 
slightly arched; and the sinus, which is placed towards the front of the margin, 
is wide, sub-trigonal, and not very deep. 
This species appears to be very rare; and although my specimens are rather 
crushed, the long, narrow beak is too remarkable to be passed without notice. 
Size.—Axis, 1 inch and 1-12th nearly ; diameter, 4-1 2ths of an inch. 
Locality.—Finchley. 
No. 196. PLeurotoma cocuus. Ff. #. Hdwards. Tab. XXXIII, fig. 6. 
P. testa elongato-fusiformi, turritd: spird acuminata: anfractibus conveais, brevibus, 
ad humeros obtuse angulatis ; postice late excavatis, marginalis, transversim subtilissime 
lineatis, cetertin levibus ; ultimo anfractu repente coarctato, in canalem longum producto : 
apertura obovatd ; labro aleformi ; sinu profundo, sub-trigono, media in margine collocato. 
A long, fusiform, turreted shell; with a much-produced, pointed spire, formed of 
nine or ten whorls: the whorls are convex, and obtusely angulated at the shoulders ; 
the posterior margins remarkably wide, depressed, broadly furrowed, and orna- 
mented with numerous, close-set, very fine, concentric, raised lines, nearly regular and 
equal, except those near the sutural edge, where five or six concentric lines, thicker 
and more prominent than the others, form a border round the suture; the middle 
and front parts of the whorls are smooth; the last whorl much contracted and 
produced in front into a long, straight canal. The aperture is of an oblong-oval 
form; the outer lip wing-shaped, projecting towards the front ; and the sinus, which 
is placed in the middle of the margin, is deep and triangular. 
