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MOLLUSC A TEST ACE A MARIUM BRITANNICORUM, 



A HISTORY OF THE 



BRITISH MARINE TESTACEOUS MOLLUSCA, 



DISTRIBUTED IN THEIR NATURAL ORDER, 



ON THE 



BASIS OF THE ORGANIZATION OF THE ANIMALS ; 



WITH REFERENCES AND NOTES ON 



EVERY BRITISH SPECIES. 



BY 



WILLIAM CLARK. 



LONDON: 



JOHN VAN VOORST, PATERNOSTER ROW. 



M.DCCC.LV. 



