Fusus. 
MOLLUSCA. 
Gl 
shell covered with numerous, nearly obsolete, spiral striae; aper¬ 
ture oblong-ovate, slightly pointed above and below, ending iu 
a short, nearly straight canal; inner lip smooth, rather broad in 
proportion to the size of the shell; outer lip thin and even on 
the edge. 
In some fossil specimens the beak is considerably curved. 
Found at Ilolywells, Aldborough and Walton, Suffolk. 
11. F. Manni.—M ann’s Fusus, pi. XXXVI. fig. 20, 21. 
Murex rugosus. Sowerby, Min. Conch. II. p. 225, pi. 190, 
fig. 1, 2. 
Shell subfusiform; spire consisting of five or six well rounded 
volutions, terminating in a somewhat obtuse apex, with about 
twelve longitudinal, elevated ribs; the whole shell covered with 
regular spiral striae, and the body volution devoid of ribs; aper¬ 
ture elliptical, a little pointed above, and terminating beneath 
in a short, straight canal; inner lip smooth, slightly reflected on 
the columella above, and gradually widening as it descends, 
until it reaches the beak, when it becomes suddenly contracted; 
outer lip slightly thickened and smooth on the margin. 
Named in honour of my respected friend Robert Mann, Esq., 
surgeon, Manchester, a zealous naturalist. 
Found in the Crag at Plumstead. 
12. F. Pakkinsonii—P arkinson’s Fusus, pi. XXXVI. fig. 
17. 
Murex rugosus. Parkinson, Org. Rem. III. p. G4, pi. 5, 
fig. 16. 
Shell elongated; spire rather more than a third of the length 
of the shell, consisting of five or six moderately ventricosc 
volutions, terminating in an obtuse apex; with many longi¬ 
tudinal, rather flat ribs, crossed by numerous faint stria?; aper¬ 
ture ovate, a little contracted above, and ending below in a short, 
slightly bent canal; pillar lip smooth and broadly reflected on 
the columella; outer lip a little thickened internally. 
Found in the Crag, Essex. 
13. F. interruptus. — The Interrupted Fusus, pi. 
XXXVI. fig. 37,38. 
Murex interruptus. Pilkinton, Linn. Trans. VII. p. 117, 
pi. 11, fig. 5. Sowerby, Min. Conch. III. p. 181, pi. 304, fig. 
1 , 2 . 
Shell subturreted; spire smooth and of medium length, con¬ 
sisting of five or six nearly flat volutions, terminating in a sharp 
apex; the smaller volutions with a broad, flattened space, above 
which two sharp furrows run along their upper edges: body 
rather inflated, covered with many spiral furrows; aperture 
ovate, slightly pointed above, terminating beneath in a wide, 
slightly curved canal of medium length ; inner lip smooth, a 
little reflected on the columella, and displays the impression of 
the sulci beneath, which produces a striated appearance; outer 
lip plaited internally, and smooth on its margin. 
Found in the London Clay in Hampshire, and at Barton. 
14. F. junceus.—T he Slender Fusus, pi. XXXVI. fig, 
29, 30. 
Murex junceus. Brander, Foss. Ilant. p. 17, pi. 1, fig. 26. 
Buccinum junceum, Sowerby, Min. Conch. IV. p. 103, pi. 
375, fig. 1. 
Shell much elongated and taper; spire greatly produced, 
ecpial in length to the body, with six or seven moderately in¬ 
flated volutions, divided by a small, plain furrow, and termi¬ 
nating in an obtuse apex; whole shell covered with sharp, 
elevated, uniform, spiral and longitudinal stria?, producing a fine 
reticulated appearance; aperture long, narrow, acute, and angu¬ 
lar above, with a slight internal notch, terminating below in a 
very short, straight canal; inner lip smooth, broad above, and 
narrowing as it descends; outer lip somewhat arcuated in its 
centre, sharp at the edge, and deeply striated within. 
Found at Barton, and in the London Clay at Ilighgate. 
15. F. sulcatus. —The Furrowed Fusus, pi. XXXVI. fig. 
18, 19. 
Buccinum sulcatum. Sowerby, Min. Conch. IV. p. 103, pi. 
375, fig. 2. Fleming, Brit. An. p. 344. 
Shell greatly elongated, subturreted ; spire much produced, 
equal in length to the body, consisting of six or seven ventricosc 
volutions, terminating in an obtuse apex, furnished with about 
seven linear, transverse furrows on each of the volutions; aper¬ 
ture ovate, ending below in a short, slightly recurved canal; pillar 
lip smooth, a little concave; outer lip considerably thickened, 
rounded beneath, with about twelve elongated teeth internally. 
Found in the Crag at Ramshot. 
16. F. Mitrula, —The Mitre-formed Fusus, pi. XXXVI. 
% 3,4. 
Buccinum Mitrula. Sowerby, Min. Conch. IV. p. 103, pi. 
375, fig. 3. 
Shell turreted; spire Long, about equal to the body, with six 
or seven volutions, ending in an acute apex; the whole shell 
covered with from ten to twelve longitudinal ribs, which are 
most prominent on the upper part of the volutions; aperture 
elongated, a little contracted both above and below, obtuse 
above, terminating in a short, straight, wide canal, which is even 
at the base; inner lip narrowly reflected on a straight columella; 
outer lip almost straight on the margin, having a small rounded 
sinus near its junction with the body, below which it is slightly 
produced. 
Found in the Crag at Ramshot. 
17. F. costelliferus. — The Small-ribbed Fusus, pi. 
XXXVI. fig. 11, 12. 
Fusus costellifer. Fleming, Brit. An. p. 353. Murex cos- 
tcllifer , Sowerby, Min. Conch. II. p. 225, pi. 199, fig. 3. 
Shell subturreted; spire of medium length, consisting of four 
somewhat ventricosc volutions; with about eighteen rather de¬ 
pressed, slender, longitudinal ribs, crossed by numerous, sharp, 
spiral stria?; aperture subovate, slightly contracted above, and 
terminating in a short, open, and nearly straight canal; inner lip 
reflected on the straight part of the columella only; outer lip 
expanded, and smooth on the margin. 
Found iu the Crag at Malden. 
18. F. gradatus.— The Graduated Fusus, pi. XXXVI. 
fig. 7, 8. 
Fusus gradatus. Fleming, Brit. An. p. 352. Murex gra- 
datus , Sowerby, Min. Conch. II. p. 227, pi. 199? fig. 6. 
Shell ventricose; spire short, acute, consisting of four ab¬ 
ruptly tapering volutions, terminating in a sharp apex, with 
about ten longitudinal, varicose ribs, which are very prominent 
above, and producing a square, strongly turreted, and flattened 
step-like appearance in the volutions; aperture oval, slightly 
angular above, ending in a short, open, slightly curved canal; 
inner lip smooth; outer lip a little expanded, and even on the 
margin. 
Found in the Crag at Malden. 
