Murex. 
MOLLUSCA. 
57 
Oblong-ovate; spire consisting of eight prominent, abruptly 
tapering volutions, deeply divided by the suture; body furnished 
with five or six transverse, rather depressed ribs, which are pro¬ 
minently knotted at somewhat regular intervals; the spire has 
only two ribs on each volution; about three longitudinal varices 
traverse the body, which however, do not extend beyond the 
inflation of the volutions; whole surface covered with numerous, 
elevated, spiral striae, several of which are large towards the 
centre of each volution; in the intervals between the ribs at 
the backs of the varices are deep hollows; aperture nearly cir¬ 
cular, slightly narrowed above and below; inner lip smooth, 
thinly reflected on the columella, and slightly subumbilcate 
behind at the base of the body, with a few wart-like tubercles 
near its lower extremity; outer lip thick with strong crenula- 
tions, within, and also on its outer margin; beak short, thick, 
and slightly ascending. 
Found in the London Clay at Barton Cliff. 
6. M. alveolatus —The Celled Murex, pi. XXXIV. fig. 
15, 16. 
Busus alveolatus . Fleming, Brit. An. p. 354. Murex 
alveolatus , Sowerby, Min. Conch. V. p. 9- pi. 411, fig. 2. 
Oblong-ovate, considerably acuminated; spire nearly equal 
to the body in length, consisting of seven rapidly decreasing 
volutions, deeply divided by the suture, flattened above, and 
terminating in an acute apex; whole shell covered by pro¬ 
minent longitudinal and transverse ribs, producing deep cell-like 
interstices, which are provided with less prominent transverse 
ribs; aperture ovate, a little pointed above and below; beak 
short and but slightly curved; inner lip smooth, reflected on 
the columella, with an open umbilicus behind at its base; outer 
lip somewhat thickened, toothed within, and thin at its edge. 
Found in the Crag, Suffolk and Norfolk. 
7. M. bispinosus.—T he Tvvo-spined Murex, pi. XXXIV. 
fig. 24, 25. 
Murex bisjyinosus. Sowerby, Min. Conch. V. p. 15, pi. 416, 
fig. 2. 
Oblong-ovate; spire consisting of six volutions terminating 
in an acute apex; body with three foliated and laminated 
longitudinal varices, beset with two prominent acute canalicu- 
lated spines on each varix; these extend over the spire, which 
is provided with two or three transverse ridges; between each 
varix is placed a small tubercle; aperture ovate; inner lip 
slightly reflected on the columella, and continuous with the 
outer lip, which is thin on the margin, thickened, and toothed 
within ; beak nearly straight. 
Found at Barton Cliff. 
8. M. Calcar —The Spur Murex, pi. XXXIV. fig. 31, 32. 
Murex calcar. Sowerby, Min. Conch. V. p. 7, pi. 410, 
fig. 2. 
Oblong-ovate; spire acuminated, nearly equal in length to 
the body, and consisting of six, subturreted, volutions obliquely 
flattened above, and terminating in a pointed apex; the spire 
provided with numerous elevated, sharp ribs, and those of the 
body somewhat obsolete, where they only appear in the form of 
blunted tubercles; two transverse spinous ribs invest the body 
volution, and assume a spur-like appearance on the margin of 
the outer lip, with a slight canal in their centre; shell covered 
with strong, remote, elevated, partially granulated striae; aper¬ 
ture sub quadrangular, slightly pointed on its upper extremity; 
inner lip smooth and narrowly reflected on the columella, and 
is continuous on the outer lip, which is thin; beak long, the 
canal nearly closed in front. 
bound in the Green Sand, Blackdown. 
9. M. defossus -The Hidden Murex, pi. XXXIV. fig. 
11 , 12 . 
Murex defossus. Sowerby, Min. Conch. V. p. 9, pi. 411, 
fig. 1. Buccinum defossum, Pilkinton, Linn. Trans. VII. 
p. 117. 
Oblong-ovate; spire acuminated nearly equal in length to 
the body, consisting of seven well rounded, deeply defined 
volutions, terminating in an acute apex; whole shell covered 
with numerous, sharp, elevated, longitudinal, and alternately 
large and small transverse ribs; intervening cells smooth; aper¬ 
ture ovate, slightly pointed above and below; inner lip smooth, 
broadly reflected on the columella above,—where it has one 
or two irregular plaits,—and narrowing as it descends; outer lip 
thin on the edge, considerably thickened within, and provided 
with many, elongated, lamellar teeth; beak short, and but 
slightly curved. 
Found at Ilordwcll. 
10. M. frondosus. —The Leaved Murex, pi. XXXIV. fig. 
22, 23. 
Murex frondosus. Lamarck, Env. de Paris, p. 51. Ib. 
An. San. Vert. VII. p. 573. Sowerby, Min. Conch. V. p. 16, 
pi. 416 , fig. 3. 
Oblong-ovate; spire short, subturreted, consisting of five 
deeply defined volutions, and terminating in an acute apex; 
body with eight or nine sharp, elevated, longitudinal, foliated 
varices; crossed by numerous transverse ribs, producing a tuber- 
culated appearance as they pass over the longitudinal ribs, and 
giving a rough feel and crisped appearance to the whole of their 
lamellated surface; intervening cavities rough ; aperture nearly 
circular; beak short, thick, and slightly curved; canal nearly 
closed; inner lip smooth, broadly reflected over the columella 
above, and abruptly narrowing as it descends; outer lip sharp 
on the edge, with a broad foliated expansion on its outer side. 
Found at Ilighgate Hill and Barton. 
11 . M. tricarinatus. — The Three-keeled Murex, pi. 
XXXIV. fig. 13, 14. 
Murex tricarinatus. Lamarck, An. San. Vert. VII. p. 177* 
Sowerby, Min. Conch. V. p. 15, pi. 416, fig. 1. Murex asper, 
Brander, fig. 77, 78, 79, and 80. 
Oblong-ovate; spire about the same length as the body, con¬ 
sisting of six subturreted volutions, and terminating in an acute 
apex; with three elevated, longitudinal, foliaceous, dentated 
varices, extending from the body to the tip of the spire ; crossed 
by about seven wide-set prominent stria?, which correspond with 
the plaits of the varices, these are provided with a long, canali¬ 
culate spine on the top of each; aperture semi-ovate; inner lip 
slightly reflected on the columella; outer lip with a broad 
foliated margin ; beak considerably recurved; canal rather wide. 
Found at Barton Cliff. 
12. M. quadratus.—T he Squarish Murex, pi. XXXIV. 
fig. 37. 
Murex quadratus. Sowerby, Min. Conch. V. p. 7, pi. 410, 
fig. i. 
Short, slightly rhomboidal; spire short, consisting of three 
gradually tapering, slightly defined Volutions, apex rather 
