PULMONATA. 131 
margin, flattened towards the base, and furnished with numerous regular teeth, of which 
the posterior ones are pliciform. The anterior canal is defined by an obscure, nearly 
vertical plait on the outer lip, and a curved elevated plait at the base of the columella ; 
inner lip thickened, and spread out at the base, forming a prominent callus towards 
the front of the whorl, plicated along the whole length on the inner margin, and 
produced at the posterior extremity into a bluntly pointed projection which forms the 
left wall of the posterior canal. Columella nearly straight, flattened, and presenting 
towards the front end, a deep three-sided concavity connected with the body whorl by 
a short, wide depression; columellar teeth pliciform, the posterior ones longer and 
more oblique than the others. 
This species, the prettiest of the English Eocene cowries, resembles C. media, (Desh.) 
more closely, perhaps, than any other of the fossil Cypraez ; but the elevated spire, the 
anterior callus, and the strongly marked posterior canal impart to it a distinct 
character. 
Size.— Axis, rather more than | inch: diameter, 7-10ths of an inch nearly. 
Locality —Barton, where it is not very common. 
No. 75. CypR#&A TUBERCULOSA. Duclos. Var. CoomBit. Sowerby. Tab. XVI, 
fig. 2, Tab. XVII, fig. 5. 
OvULA TUBERCULOSA, Duclos. 
Cyprma Desnayesn, Gray. (1832). (Add. to Mon. Cypr.,) Zool. Journ., vol. iv, p. 83, 
No. 64*. 
— — G. Sow. (1832). (Notes on Gray’s Additions to Mon. Cypr.,) Zool. 
Journ., vol. iv, p. 221. 
OvuLa TUBERCULOSA, Desh. (1824-37). Desc. des coq. foss, &e., vol. ii, p. 717, t. 96, fiz. 16, 
$97. If. 
= — Desh. (1844). 2d edit. Lam. Hist. nat., vol. x, p. 478, No. 3. 
Cyprma Coomsit, J. Sow. (1850). Dixon’s Geol. &c., Sussex, pp. 108 and 188, t. 8, fig. 6. 
OvuLa TuBERcuLosa, D’Orb. (1852). Podrome de Paléont., vol. ii, p. 314, No. 297. 
C. testa magnd, trigond, ventricosd, levi, dorso aliquando tuberculatd, subtus planulata : 
apertura elongata, angustissima, feré edentuld, arcuatd, anticée latiori, utraque extremitate 
canaliculatd ; canal posteriori ad spiram reflexo, canali anteriori recto : labro compresso 
postice exserlo, sub-auriculiformt, lateraliter expanso, 
Shell large, trigonal, ventricose, smooth, sometimes presenting one or two tubercles 
on the back; base flattened, posterior end very broad, flattened, almost truncated : 
aperture elongated, curved, very narrow, rather wider in front, nearly if not altogether 
toothless, with a wide canal at each extremity ; the anterior canal straight, the posterior 
one curved and bent upwards towards the spire; outer lip broad-edged, expanding at 
the posterior extremity into an ear-shaped projection. 
