420 
THE OCEAN WORLD. 
little oval shell, depressed, flat below, with very thick edges, an<l 
slightly waving. It is of a uniform yellowish white colour, sometimes 
Figs. 240 and 241. Cyprwa undata (Lamarck). 
Figs. 242 and 243. Cypnea 
(Linnaeus). 
citron-yellow above and white below. There are usually twelve teet 
in the opening. It comes from the Indian Ocean, the Maldi'T 111 
Isles, and the Atlantic Ocean. 
This shell, so common in collections, is gathered by the women (ll j 
the shore of the Maldivian Isles, three days after the full moons am 
before the new moons ; it is afterwards transported to Bengal, L 
India, and Africa, where, as we have already said, it is used by tJl 
negroes and other natives as money. 
Figs. 244 and 245 Fig. 246. Cyprsea Madagascariensis 
Cypnea moneta (Linnanis). (1 and 2). 
The Madagascar Porcelain, Cypnea Madagascar iensis (Fig. 24 
and the Granular Porcelain, Cypnea nucleus (Figs. 250 and 251), a,e 
beautifully marked species, having the general appearance of the 0o«i» 
The species most abnudant in the Channel is the little Coca m * 
already mentioned ; it is very small, oval, tun-bellied, the opeW 11 ^ 
dilated in front with smooth transverse stripes of greyish, tawny, 
rose colour, with or without spots. 
Cypnea mappa (Pm XXII., Fig. IY.) is oval-shaped, swelling 
sides, well-rounded, ornamented with small white spots below, wit! 
below i* s 
[i a dorsal 
