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GB. SOWERBY, in constant receipt of interesting SHELLS from all parts 

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PRESENT SPECLA.LITY.— A wonderful stock .^f PTEI'lOPODA, from 

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BOOKS BY G. B. SOWERBY, F.L.S. :— 



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''Ilhistratcd Index of British Shells. ' Coloured figures of all known species. 



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