( iHBONOLOGY OF N A M I B. 



The chronologic arrangement of the names given to the series ot nicks 

 under consideration is as follows: 



Salmon River ; ( lonrad, L836. 

 Hudson River ; Mather, 18 I". 

 Lorraine ; Emmons, 1*42. 

 Nashville; Safford, L853. 

 Cincinnati; Meek and Wbrthen, 1866. 

 Maquoketa ; White, 1870. 



I >I8< OVERIEg OF R] :< l.\ I Vi.AKs. 



The discovery of fossils other than graptolites in the dark shale- or Band- 

 stones of the Hudson River group below Albany has been infrequent. Mr. 

 T. Nelson Dale found a few species al Marlborough, about ciirht miles south 

 of Poughkeepsie, in 1879, and Mr. NTelson II. Darton found a few Trenton- 

 Hudson species twenty-one miles south of New burgh, in 1885. < >n the east Bide 

 of the Hudson, Mr. Dale discovered, in an argillaceous schist near Vassar 

 1 liege, an assemblage of fossils much like thai reported by Mr. Darton in 



Orange county. The species range in the Trenton Limesl ■ and also in the 



upper part of the Beries in central New Vm-k. Mr. Dale Bays of them: 



•■ The occurrence of these fossils in these localities would then establish the fact that 

 the gray slates and shales in the vicinity of Poughkeepsie, on both Bides of the river, 

 are ■ rous, and that they very probably belong to the Hudson River group, as 



indicated by Mather in I848j certainly, to some member of the Trciii.ni period. 

 i facts also speak in Eavor of the retention of the terra Hudson River group, as 



advocated by Hall." 



The mosl important discovery of fossils in the Hudson Beries, however, 

 was thai made by Mr. C E. Beecher in the beds near the Dudley observa- 

 tory, a shorl distance west of Albany."] The fauna included 26 species; and 



.in. Jour - 17,1-7' 



i- from in exposure oj the Utloa slate and associated rooks within tin- 

 inv (36th Ann. Ri i v v State Mua. Nal Hisl . i- 



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a of Billing 



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