60 Zoological Society. 
possess several characters by which it is most easily distinguished 
from all other described species with which I am acquainted. 
“Inits teeth, which are not elongated over the columellar side, in 
the internal columellar groove, in its apical umbilicus, and in the 
much-produced posterior extremities, as well as in other characters, 
it differs essentially from Cyp. Walkeri of Gray; and it has not the 
slightest appearance of malformation or monstrosity of form. I am 
therefore of opinion it is a perfectly distinct species, and ought to 
be described as such. “Yours, &c., 
“©G. B. Sowrersy.” 
“ 30th March, 1848.” 
“To J. S. Gaskoin, Esq.” 
5. Cypraa opscura (Dusky Cowrie). Cyp. testd ovatd, albicante, 
maculis duabus dorsalibus nigricantibus inconspicuis ; costellis 
rudibus, prominentibus, ad dorsum concoloribus, ad margines et ad 
basin albis ; dentibus labii externi circa viginti, labii interni di- 
stantibus circa duodecim ; sulco columellari lato, margine interno 
dentibus serrato ; extremitatibus albis, crassis, productiusculis. 
Shell ovate, of a dingy white colour, having two remarkable small, 
blackish, undefined spots or markings on the dorsum, one a little 
less than a third the length of the shell from each extremity; ribs 
coarse and prominent, on the back of the same colour as the shell, 
but on the margins and base of a pure white ; they traverse the shell 
from one side of the aperture to the other, having a slight curving at 
the centre of the dorsum; on the outer side several terminate on the 
side of the shell, fewer terminate on the columellar side, where some 
float; base white, rather round; aperture straightish, curved at the 
posterior end, rather narrow ; teeth even, formed by the coste, about 
twenty on the lip and about twelve on the columellar side, where 
they are distant and extend over a broad columellar groove to serrate 
its inner ridge; margin on the outer side thick and white, none on 
the columellar side; extremities white, thick, and somewhat pro- 
duced. No dorsal impression. 
Length, ;3¢,ths of an inch; altitude, 2°,ths; breadth, ;25,ths. 
Hab. North-west Australia; Dupuch’s Island (under stones, low 
water), collected by J. KE. Dring, Esq., R.N. Abrolhos Island (under 
coral), by ditto. 
Cabinets of Gaskoin, Saul, &c. 
This shell is perhaps nearest in form to Cyprea pulex, Gray, but 
cannot be confounded with any known species. I have had for 
several years specimens of this shell, and the locality given me with 
them was Senegal; but as Mr. Dring has lately brought others to 
this country, I have thought it right to give so authenticated a habi- 
tat as we have received from him. 
This manuscript description having been written for a few years, 
I send it for insertion in the ‘ Proceedings,’ although Kiener appears 
to have described it in his work, ‘ Spécies Général,’ &c., under the 
name of Cyp. Napolina, a name ascribed to Duclos; but Kiener does 
not say by what authority, yet I conclude that that appellation 
should stand. Kiener’s figures, pl. 53, figs. 3 and 3, are no repre- 
