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ETUDES SUR LES QRAPTOLITES DE BOHEHE. 



par le Dr. PERNER, assist, au Musee d'hist. Datur. i\ Prague. 

 ' Suite de I'ouvrage. Systems sUurien du centre de la Boheme, par T. Barrande. 



I. Part. Structure microscopique des geares Monograptua et Reiialiies. 15 M. 

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inferieures, 15 M., Section b.. Zones sup6rieures {h parattre). 

 IV. Part. Etudes gfiniiirales stratigraphiques et comparatives sur la distribution et I'ordre de succession des graptolites en 

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