MOLLUSCA. 
Caliendrum. 
5*2 
1. P. tetragoxa. — The Tetragonal Purpura, pi. XXXII. 
fig. 17, 18. 
Purpura tetragonum . Fleming, Brit. An. p. 341. Bucci- 
num tctragonum , Sowerby, Min. Conch. V. p. 13, pi. 414, 
tig. 1. 
Shell thick, ovate ; body large ; spire short, consisting of 
four narrow volutions, a little flattened above ; whole shell 
provided with strong, elevated, longitudinal ribs, crossed by 
four large, and several smaller, intermediate, transverse fur¬ 
rows between them, which divide the shell into squarish cells ; 
aperture oblong-ovate, rounded above, and slightly contracted 
below ; columella smooth, broadly and thickly reflected, and 
continuous above ; outer lip somewhat undulous on the mar¬ 
gin, provided with strong blunt tubercular teeth within ; 
beak short, and but slightly curved. 
Discovered by Mrs Cobbold, in the Crag, near Ipswich. 
2. P. crispata. — The Curled Purpura, pi. XXXII. 
fig. 33, 34. 
Purpura imbricata . Lamarck, An. San. Vert. VII. p. 557. 
P . tapillus , Lamarck, Env. de Paris, p. 36. P. crispatum , 
Fleming, Brit. An. p. 341. Buccinum crispatum , Sowerby, 
Min. Conch. V. p. 12, pi. 413, fig. 3. 
Shell oblong-ovate ; body large ; spire short, consisting of 
five or six well-defined, inflated volutions, terminating in a 
somewhat acute apex; whole surface invested with nume¬ 
rous, close, spiral ribs, which are covered by rough, imbri¬ 
cated scales, with several projecting, longitudinal lines of 
growth ; aperture semiovate, rounded above, and slightly 
contracted below ; inner lip smooth, and reflected on the 
columella, continuous above, and not extending to the 
base of the short beak below ; outer lip slightly reflected, 
thin, and undulous on the margin, and suberenated inter¬ 
nally. 
Found plentifully in the Suffolk and Norfolk Crag. 
3. P. carinata. The Keeled Purpura, pi. XXXII. 
fig. 41,4*2. 
Purpura crispatum. Fleming, Brit. An. p. 341. Bucci¬ 
num crispatum , Sowerby, Min. Conch. V. p. 12, pi. 413, 
fig. 2. 
Shell oblong-ovate, subturreted ; body large ; spire short, 
consisting of four or five volutions, which, with the body and 
surface, are obliquely flattened above ; whole covered with 
strong, remote, transverse, rounded ribs, which arc invested 
with rough, imbricated scales, the superior rib on the body, 
and central one on the spire, being more elevated than the 
rest; the Intervening furrows with longitudinal curved strife; 
aperture ovate, rounded above; pillar lip smooth, continuous 
above, and extending to the base of the short canal; outer 
lip thin, undulous on the margin, and suberenated inter¬ 
nally. 
Found in the Norfolk and Suffolk Crag. 
4. P. i ncrassata. —The Thickened Buccinum, pi. XXXII. 
fig. 39, 40. 
Purpura mcrassatum. Fleming, Brit. An. p. 341. Bucci¬ 
num incrassalunty Sowerby, Min. Conch. V. p. 13, pi. 414 
fig. 2. 
Shell very thick, ovate ; body large ; spire very short, 
being only a third the length of the body in front, consisting 
of four volutions, terminating in an obtuse apex ; all the 
volutions obliquely flattened above ; body provided with five 
or six strong, rounded, transverse ribs, the superior one the 
largest, which continues spirally along the centre of the volu¬ 
tions ; the whole surface covered with irregular, broken, 
waved, longitudinal stria', or lines of growth ; aperture rather 
small, subovate, rounded above, and slightly contracted 
below ; pillar lip broadly reflected on the columella, and con* 
tinuous above ; outer lip a little thickened and undulous on 
the margin, with obscure furrows, and blunted tubercles 
between them internally. 
Found plentifully in the Suffolk Crag. 
5. P. deserta. — The Forsaken Purpura, pi. XXXII. 
fig. 3, 4. 
Purpura desertum. Fleming, Brit. An. p.342. Buccinum 
desertum> Brander, Fossil, Plant, fig. 15. Sowerby, Min. 
Conch. V. p. 14, pi. 415, fig. 1, two smaller figures. 
Shell ovate ; spire short, conical, consisting of five some¬ 
what depressed volutions, abruptly tapering to a point, and 
separated by a broad, rounded groove, which winds spirally 
close to the suture ; the whole shell provided with numerous, 
longitudinal, irregular, rather flattened ribs, with sharp points 
upon their upper extremities, which are crossed by remote, 
spiral strife; aperture ovate, widened above and narrow 
below, with distant grooves within ; columella smooth, with 
an obscure fold at its base ; canal very short. 
Found at Barton Cliff, in the Blue Clay. 
6. P. Dentii. Dent’s Purpura, pi. XXXII. fig. 5, 6. 
Buccinum desertum . Sowerby, Min. Conch. V. p. 14, 
pi. 415, fig. 1, larger figure. 
Shell oblong-ovate; spire conical, consisting of five some¬ 
what inflated volutions, tapering rather abruptly to an obtuse 
apex ; the volutions separated by a double, wide, spiral fur¬ 
row, situate immediately below the suture ; the whole shell 
furnished with strong, longitudinal, unequal ribs ; aperture 
ovate, widened above, and a little contracted below, and 
grooved internally ; columella smooth; aperture short. 
This species differs from the preceding in having a double 
spiral groove separating the volutions, and in the spire being 
somewhat more produced. 
Found in the Blue Clay at Barton Cliff'. 
Genus XIV.—C A LI ENDR UM.— Brown. 
Shell oblong-ovate, acute ; volutions deeply divided ; 
aperture irregularly ovate ; columella greatly reflected 
and undulous, destitute of a canal at the base ; outer lip 
very broad, somewliat reflected and smooth on the 
margin. 
I. C. vittatatum. —The Girdled Caliendrum, pi. XXXII. 
fig. 20. 
Buccinum vittatum. Phillips, Geo. of York. II. p. 230, 
pi. 16, fig. 14. 
Shell elongated, smooth; body largo, considerably inflated ; 
spire consisting of six very ventricose, deeply-divided volu¬ 
tions, terminating in a blunted apex; a broad flat mesial band 
commences on the back of the outer lip, and encompasses 
the centre of the body and superior volutions, and terminates 
in the apex ; aperture irregularly oval ; columella undulous, 
broadly reflected on the body, continuous both above and 
below, and destitute of a canal ; outer lip broad, thick, 
reflected, and thin and even on the margin. 
Found in the Mountain Limestone at Bolland, Queen’s 
County, Ireland. 
