TAnLE XVII. — Numei'kal Table of the Silurian and Devonian FosstJs of the State of New Toil; exhibiting their Seqii 

 Groiipintf, Incitement, and Decrement ; tJie horizwital lines being the lines of privation, markiruf their absence. 





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Upp. Pentam. L. 

 Oriskany S. 

 Cnudagall. G. 

 Schoharie G. 

 Onondaga L. 

 Cornifer. L. 

 Marcellus Sh. 

 Hamilton Gp. 

 TuUy Limestone. 

 Genesee SI. 

 Portage Gp. 

 Chemung Gp. 

 Colekill Gp. 







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