424 
THE OCEAN WORLD. 
The Molluscs belong to the seas of warm countries, where they fr e ' 
quent the sandy bottoms and clear waters. They creep about with much 
agility, reversing themselves quietly when they have been overturned ; 
they live upon other animals, and are flesh-eaters. They are, in fact 
taken at the Isle of Tranu by using flesh as bait. The colours of the shell 
are very varied, and sometimes fantastically streaked. Oliva erytliTO' 
stoma (Fig. 256) is ornamented externally with Sexual lines of a 
yellowish-brown, with two brown bands, combined with the fine 
yellowish tint of gold colour within. Oliva porplu/ria, from the Brazil 
coast (Fig. 257), presents lines of a reddish-brown, regularly inter- 
laced with spotted large brown marks, upon a flesh-coloured ground- 
Oliva irisans (Fig. 258) is painted in zigzag lines, close and brown, 
edged with orange-yellow, and with two zones of darker brown, and 
reticulated. Oliva Peruviana (Fig. 259) is furrowed with regularly 
spaced bands. 
Mitra and Cassis. 
Beside the Olives and Volutes in the system, and resembling them m 
many respects, we find the Mitre 3 ? 
so called from their resemblance 
to the bishop’s mitre. They are 
natives of warm climates, such aS 
the Indian Ocean, the Australia 11 
Seas, aud the Moluccas. The shell 
of the Mitra is long, slender, and 
spiral, the spire ending in a pond 
at the summit; the opening is small? 
narrow, and triangular, and notched 
in front. The inhabitant of the 
shell has the peculiarity of project' 
ing from its mouth a sort of cylin* 
drical trunk, which is long, very 
extensible as well as flexible, and 
probably prehensile, the use 
which is only subject of surmise- 
Fig. 261 . Mitra papain Mitra episeopalis (Fig. 260), 
t Lamarck). the Indian Ocean, is white, orna- 
mented with square spots of a fine red, and capable of high polish. 
Fig. 260 . Mitra epis- 
copalis (Lamarck). 
