SECOND GEOLOGICAL SURVEY OF PEiNNSYLVANlA. 

 REPOET OF PROGRESS. 



PPP. 



^ERATIOCARID^ 



FKO.M THE 



UPPER D E V O N I A X MEASURES 



IX WARRKX COUXTY, 

 / 



BY 



Chas. E. Beecheb. 



u 



With Opiates. 



EURYPTERID^ 



FllOM THE 



LOWER PRODUCTIVE COAL MEASURES 

 IX BEAVER COUXTY, 



A.VD THE 



LOWER CARBONIFEROUS, PTTHOLE SHALE, 

 IN VENANGO COUNTY, 



Jamks Hall. 

 With plates. 



II A RKIS \\V] RC;: 



PUBLISHED BY TIIP: HOARD OK COM MIHH10NBR8 

 FOK TUB SECOND <; KOI.O'JICAI, SL'UVKV. ^ 



1K8 4. \C\) ^^' 



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