60 
MOLLUSCA. 
Fusus. 
3. F. Lima —The File Fusus, pi. XXXV. fig. 19- 
Fusils Lima. Sowerbv, Min. Conch. V. p. 28, pi. 423, 
fig. 4. 
Fusiform; spire consisting of six volutions, with their upper 
edges elevated and pressed upon the spire, and terminating in a 
pointed apex; the shell covered with transverse and longitudinal 
elevated ribs, which at the points of intersection produce an 
acute spiniform appearance upon the lower parts of the shell, 
but upon the superior portions of the volutions, these become 
simple stria?, and are decussated by depressed lines of growth. 
Found in the London Clay at Barton Cliff. 
4. F. CONIFERU5.—The Pine-shaped Fusus, pi. XXXVI. 
fig. 1,2. 
Fusus coniferus. Sowerbv, Min. Conch. II. p. 195, pi. 187, 
fig. 1. 
Shell greatly elongated; spire consisting of six or seven 
inflated, deeply divided volutions, slightly flatteded above, and 
terminating in an acute apex; body and beak with twelve or 
thirteen spiral, distant, narrow, and slightly elevated ribs, the 
volutions of the spire with four or five only, the intervals with 
numerous close-set, irregular, slightly undulating striae, crossed 
by distant, longitudinal, unequally elevated undulations, which 
are obsolete on the upper part of the volutions; aperture oblong- 
ovate, about half the length of the shell, wide above, narrowed 
below, and ending in a short, wide canal; inner lip smooth and 
narrow; outer lip sharp and even on the edge. 
The volutions of the spire appear as if they were tuberculate, 
from the ribs passing over the longitudinal undulations, which are 
more prominent than on the body. 
Found at Highgate Hill. 
5. F. striatus. —The Striated Fusus, pi. XXXVI. fig. 
26 . 
Murex striatus. Sowerbv, Min. Conch. I. p. 61, pi. 22, fig. 
I, 2, 3. 
Ventricose; spire short, being not quite a fourth of the length 
of the shell, consisting of five or six rounded volutions, and ter¬ 
minating in a somewhat obtuse apex ; the whole shell covered 
by numerous, distant, rounded, and rather flattened narrow 
transverse ribs, with from three to five fine, parallel, but not 
very equal stria?, occupying the intervening spaces; these are 
crossed by obsolete lines of growth and stria?; aperture semi- 
ovate, rounded above, and rather narrow below, and ending in 
a short, wide, and nearly straight canal; inner lip smooth and 
broadly reflected on the columella, which is widest above, and 
contracts as it descends, with a duplicature behind at the beak ; 
outer lip smooth and even. 
This shell varies in size from three to four inches and a quarter. 
Found in the Crag-pits of Suffolk and Essex, and at Holy- 
well, near Ipswich. 
6. F. carinatus. —The Keeled Fusus, pi. XXXVI. fig. 
45. 
Murex striatus , variety a carinatus. Sowerbv, Min. Conch. 
II. j>. 13, pi. 109, fig. 1. 
Oblong-ovate; spire short with four volutions, terminating in 
an obtuse apex, body with six or seven rounded and prominent 
transverse ribs, and two on the volutions of the spire, inter¬ 
vening spaces covered with irregular spiral strife ; crossed by 
nearly obsolete, longitudinal w rinkles and lines of growth ; aper¬ 
ture oblong-ovate, slightly pointed above, and terminating in a 
short, slightly oblique, open canal; pillar lip smooth and broadly 
reflected on the columella; outer lip regular and rather blunted 
on the edge. 
Found in the Crag pits of Essex and Sussex. 
This species is liable to considerable variety in the disposition 
and character of its transverse ribs. 
7. F. ERKANS. —The Wandering Fusus, pi. XXXVI. fig. 
33, 34. 
Fusus errans. Sowerby, Min. Conch. IV. p. 139, pi. 400. 
Strombus errans , Blander, Foss. Hant. p. 23, pi. 2, fig. 42. 
Oblong-ovate; spire acute, subturreted, and of medium 
length, consisting of six volutions flattened above and ending in 
a pointed apex; body, with two large prominent, and several 
lesser intermediate transverse ribs; the whole shell covered by 
fine spiral stria?, these decussated by minute, longitudinal lines 
of growth, which are most conspicuous above the larger ribs; 
aperture oblong-ovate, narrowed above and below, ending in a 
nearly straight, slightly compressed canal; columella nearly 
straight ; the inner lip smooth ; outer lip thin, angular above, 
and waved below. 
Found at Hordvvell and Barton Cliffs, and it has also been 
discovered at Stubbington. 
It is distinguished from the following by always having more 
than one transverse rib, and also by its inferior size. 
8 . F. bifasciatus. —The Two-faced Fusus, pi. XXXVI. 
fig. 43, 44. 
Fusus bifasciatus. Sowerby, Min. Conch. III. p. 49, pi. 
228. Fleming, Brit. An. p. 352. 
Shell elongated; spire long, being nearly equal in length to 
the body, consisting of six turreted volutions, flattened at top, 
and much produced in the centre, nearly in the shape of a keel, 
which extends over the centre of the body volution, and termi¬ 
nates in the outer lip ; the sides of this carina are nearly equal 
in inclination ; the whole shell covered by strong, rough, longi¬ 
tudinal and transverse stria?; body somewhat ventricose below 
the keel; aperture oblong, widest above, and contracted beneath 
into a short, nearly straight canal. 
Found at Highgate Hill, 
9. F. trilineatus. —The Three-lined Fusus, pi. XXXVI. 
fig. 3o, 36. 
Murex trilineatus . Sowerby, Min. Conch. I. p. 80, pi. 35, 
fig. 4, 5. 
Shell considerably elongated; spire short, consisting of five or 
six not much inflated volutions, and terminating in a rather ob¬ 
tuse apex; whole shell covered by numerous, transverse, narrow, 
projecting ribs, each divided into three thread-like divisions; 
aperture elongated, pointed above, and terminating below in a 
straight, short, open canal; inner lip narrowly reflected on the 
columella; outer lip thin, even at the edge, with nine or ten 
folds within, situate a little way from the margin 
Sometimes extends to upwards of two inches in length. It is, 
however, usually the size of our figure. 
Found in the London Clay at Highgate. 
10. F. corneus —The Horny Fusus, pi. XXXV. fig. 20. 
Murex corneus. Sowerby, Min. Conch. I. p. 79. pi. 35. 
Three upper figures* 
Shell elongated, somewhat slender; spire long, nearly equal 
in length to the body, consisting of seven or eight slightly in¬ 
flated volutions, terminating in a somewhat obtuse apex; whole 
