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the perfect shell is much prized by collectors, and finds a deservedly 

 honourable place in their cabinets. The jewellers, too, have not lost 

 sight of its pearly brilliance, and have successfully turned it to account 

 in the manufacture of elegant trinkets, such as brooches, eardrops, and 

 the like. Whether the attention is most attracted by the brilliant iride- 

 scent hues of the nacreous interior, or the wonderful complication of the 

 remarkable hinge with which the valves are closed, the shell of Trigonia 

 must always prove an object of interest to all lovers of the beauties of 

 Nature in her ever- varying never-ending kingdom of wonders. 



