46 
MOLLUSCA. 
VOLUTA. 
Cypreea oviformis. Sowerby, Min. Conch. I. p. 17, pi. 4. 
Fleming, Brit. An. p. 331. 
Shell oviform, tumid, smooth, shining, and slightly mar- 
ginate; most inflated at about a third of its length from the 
apical end, and afterwards tapering slightly to a short, rather 
broad, canaliculate beak ; spire small, concealed ; aperture 
longitudinal, narrow at the broadest extremity, widening 
considerably towards the beak, and dentated on both of the 
inflected lips. 
Found in the London Clay at Highgate Hill. 
2. C. avellana. — The Filbert Cyprcea, pi. XXX. 
fig. 36, 37. 
Cyprcca avellana, Sowerby, Min. Conch. IV. p. 107, 
pi. 378, fig. 3. Fleming, Brit. An. p. 331. 
Shell obovate, or nearly spheroidal, with strong, numerous, 
wide-set, elevated transverse striae, extending from the 
inflected margin of one lip to that of the other, and only 
partially interrupted by a shallow longitudinal groove ; aper¬ 
ture contracted and somewhat curved at both extremities. 
The striae are sometimes longer and shorter, terminating 
before they reach the inner margins of the lips, and the inter¬ 
vening spaces are flattened. 
Found in the Suffolk Crag, by the Rev. G. 11. Leathes. 
3. C. cocci xell oi des.— The Coccinella Cypraea, pi. XXX. 
fig. 28, 29 . 
Cyprcea cocci n ell aides. Sowerby, Min. Conch. IV. p. 107, 
pi. 378, fig. 1. Fleming, Brit. An. p. 331. 
Shell ovate, somewhat spheroidal, with numerous acute 
transverse striee; aperture slightly arcuated, and not con¬ 
tracted in the centre ; outer lip convex. 
Found in the Suffolk Crag. 
4. C. retusa. —The Blunted Cyprcea, pi. XXX. fig. 38, 39. 
Cypr<ca retusa. Sowerby, Min. Conch. IV. fig. 107, 
pi. 378, fig. 2. Fleming, Brit. An. p. 331. 
Shell obovate, subsphaeroidal, with somewhat distant, ele¬ 
vated striae ; aperture slightly curved at its narrow extremity. 
This species will at once be distinguished from the C. 
coccinelloides by its few and remote strite, and its nearly 
spherical form. 
Found in the Suffolk Crag. 
Genus VI. — OVULA. — Bruguierc . 
Shell turgid, attenuated at both extremities; margins 
convolute ; aperture longitudinal, narrow at its upper 
part, and generally more widened below; effuse at both 
ends; the left margin destitute of teeth. 
1. O. Leathesi. —Leathes’s Ovula, pi. XXX. fig. 32, 33. 
Ovula Leathesi. Sowerby, Min. Conch. V. p. 124, pi. 478. 
Calpurna Leathesi . Fleming, Brit. An. p. 331. 
Shell smooth, cliptical, elongated, ventricose in the centre, 
and tapering and contracted to each extremity ; columella 
with a large plait, and with a thick testaceous glazing; outer 
lip very thick and smooth ; opposed to the lower part of 
the lip the body is somewhat flattened. 
Found in the Crag at Walton, by the Rev. G. R. Leathes. 
Family II.—COLUMELLARIA. 
Destitute of a canal at the base of the aperture, but 
having a subdorsal more or less distinct notch, with folds 
or plaits on the columella. 
Genus VII.—VOLVARIA.— Lamarck. 
Shell cylindrical, convolute; the spire hardly pro¬ 
truding above the body, and appearing as if forced into 
the superior part of the shell, where it terminates in an 
obtuse salient point; aperture narrow, extending nearly 
the whole length of the shell, somewhat wider below 
than above, and truncate at the base; columella with 
three or four oblique folds at the base. 
1. V. acutiuscula. — The Acute Volvaria, pi. XXX. 
fig. 30, 31. 
Volvaria acutiuscula . Sowerby, Gen. of Shells, Gen. 
Volvaria, fig. 3. Min. Conch. V. p. 142, pi. 487. Fleming, 
Brit. An. p. 333. 
Shell almost cylindrical, slightly contracted towards both 
ends; spire concealed, crossed by numerous, transverse, 
square-punctured striae ; plaits upon the columella variable in 
number and dimensions, generally four or five; aperture 
widened at both extremities, and somewhat straitened in 
the centre ; outer lip a little thickened, and projecting above 
the apex, and giving the spire the appearance of being con¬ 
cealed within a small pit. 
Found in the London Clay at Barton Cliff. 
Genus VIII.—VOLUTA.— Linnceus. 
Shell ovate, more or less ventricose; apex papillose; 
destitute of a canal; emarginate or notched at the base; 
columella plicated, the lower folds larger and more 
oblique than the others ; destitute of a columellar 
laminae. 
SECTION I.—PAPILLA LARGE, SMOOTH, AND CORONATED. 
1. V. Luctator. — The Wrestler Volute, pi. XXXI. 
fig. 9. 10. 
Voluta Luctator. Sowerby, Min. Conch. II. p. 29, pi. 115, 
fig. 1. Fleming, Brit. An. p. 332. Voluta musicalis. Lamarck, 
Env. de Paris, p. 26. Strombus luctator. Brander, Hant. 
fig. 64. 
Shell acutely ovate : spire short, conical, with the volution* 
concealed above; crowned with tubercular spines, which 
diminish rapidly as they ascend ; body with longitudinal ribs, 
corresponding in number to the tubercles ; these terminate at 
the base, where they become indistinct; the whole are crossed 
by numerous transverse, somewhat undulous, linear, sulci ; 
deepest towards the base ; the whole body and spire covered 
