Pal/eontographical Society, 1901 



BRITISH GRAPTOLITES. PART I. 



PLATE I. 



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2c. 



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5a. 





5c. 



5b. 



6a. 



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8a. 



9a. 





9b. 



6b. 



8b. 



8c. 



10a. 



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10b. 



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/-itDiidit, /.lii., Ihiliy. 



DIDYMOGRAPTUS. 



