87 



du Pas de Calais. 2 p. — de Chancourtois: Ob- 

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American Academy of Arts and Sc. The 

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Smithsonian Instit. Powell, Prof. J. W: 

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Museum of comparat. Zoology at Harvard 

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American Journ. of Sc. and Arts. III. Ser. 

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— Vol. XI. Nr. 61. 1876. 8". 



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