NON-PULMUJSTARY GASTEROPODS. 
419 
to be enveloped all round. The head is provided with two very long 
e onical tentacles, each having a very large eye, in which a pupil and 
^is can be distinguished. The foot is oval, elongate, and without 
°perculum, and is well represented in Cyprim tigris (Fig. 288). The 
Porcelains are found at a little distance from the shore, generally in 
olefts of the rocky bottoms ; but sometimes they bury themselves in 
the sand. They are timid, shim the light, and only leave their re- 
treats to creep about in search of food, which appears to be exclu- 
sively animal. These magnificent molluscs are natives of every sea. 
One small creature lives in the Channel ; another and much larger 
species is found in the Adriatic ; but the Indian Ocean is the home 
°f the larger and finer species of porcelain shells. 
As objects of curiosity and ornament these shells have been much in 
request in all ages. The inhabitants of the Asiatic coast make brace- 
Fig. 238 . Cypra?a tigris (Linnaeus). 
Fig. 239. Cyprtca cocci- 
nella (Lamarck). 
collars, amulets, and head-dresses of them, and use them to orna- 
ment boxes and harness. In New Zealand the chiefs carry a rare and 
°hoice species, suspended from the neck, as a badge of their rank or sign 
°r distinction. This is Oyprma eoceinella (Fig. 239). In some parts 
India and Africa a very little species, the Cowrie, passes as current 
money. The species are, indeed, very numerous, and we can only find 
room for very brief descriptions of a few of the best known among them. 
The Waving and Zigzag Porcelains, whose native country is un- 
blown, are beautifully ornamented with waving and broken lines, as we 
See them in Figs. 240 to 248. 
The Aurora Porcelain, of which we have spoken above, is nearly 
SLbular, of a uniform orange colour above, and white below ; the teeth 
°I the opening are of a bright orange. The shell is rare, and much 
s °ught after. 
The Cowrie Porcelains, Cypriea moneta (Figs. 244 and 245), is a 
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