[k;2I.] 



82 



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 POTONIE, H. Obit.— See Gothan, W. 



POWERS, S. Strand Markings in the Pennsylvanian Sandstones of Osage County, 

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■ . See also Howe, J. A., Sf Lamplugh, G. W., 5. 



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 . See also Fletcher, Sir Lazarus. 



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PRUVOST, P. L'Etat actuel de nos Connaissances G^ologiques sur le Bassin 



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 2. Note sur les Resultats de quelques Sondages profonds executes au Sud- 



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4. Nouvelles D6couvertes d'Insectes Fossiles dans le Terrain Houiller duNord 



et du Pas-de-Calais. Ibid, pp. 282-295. 1920. 



