188 DESCRIPTION OF SHELLS. 
Voluta recticosta. (Tab. V. fig. 18.) 
Spec. CuHar.—Oval, elongated, transversely and distantly striated, costated, 
crowned with two rows of erect spines ; ribs numerous, thin, straight, each ter- 
minating in a spine ; upper margins of the whorls concave between the two rows 
of spines. 
Length twice the width. ; 
Much resembling Voluta ambigua of Barton, but much less deeply striated, 
more ribbed and more acute in form; it is probably the same with V’. ambigua 
of Lamarck and Deshayes, which is different from the Barton species. 
Voluta uniplicata. (Tab. VII. figs. 45 & 46.) 
Spec. Cuar.—Fusiform, subturrited, finely striated; volutions slightly con- 
vex, flattened in the middle, those on the spire costated, the last plain ; columella 
nearly straight, with one plait near the base ; aperture oblong-elongated, rather 
square above ; pullus large. 
Length 5, width 2. 
A very distinct and not uncommon shell. 
Cypraa Coombu. (Tab. VIII. fig. 6.) 
Spec. Cuar.—Triangular, ventricose, posteriorly truncated, smooth ; base 
flattened ; the outer lip broad-edged, with a projection near the posterior end, 
nearly toothless ; aperture very narrow, with the posterior canal curved upward 
on to the spire, the other extremity straight. 
Length 63, width 5. 
The more triangular form and greater size have induced a belief that this may 
be a different species from Cyprea tuberculosa (Ovula) of Duclos, found at Ré- 
theuil, &c. The large tubercles that are mentioned in the specific character of 
that species by Deshayes (v.11. p. 717) are not constantly present, and they occur 
in some of the English specimens, therefore they can only be considered as 
accidental. First found at Bracklesham by Mr. Coombe, whose zeal in the 
search of fossils is commemorated in the name. 
The want of teeth in the aperture has led to this being called ‘‘ Ovula,” but 
there are slight indications of teeth. It belongs to the same division as Cyprea 
Mus, and with it might form a good subgenus. 
