192 



NEW YORK STATE MUSEUM 



■ 



7 



served shows a coarsely pustulose glabella, which has a very 



wide anterior lobe and is sub- 

 pentagonal in outline; promi- 

 nent crescentic eves, stout genal 

 spines and a strong moderately 

 long central or occipital spine 

 are further characteristics. 

 P r o e t u s c r a s s i m a r g i - 

 natus [fig. 120] is likewise 

 chiefly represented by pygidia, 

 the small size, regular curva- 

 ture and marginal rim of which 

 easily characterize it. The 

 large, smooth glabella with very 

 small posterior lobes is also 

 rea d i 1 y distin gui shed . 



Schuchert has suggested the 

 possible equivalency of the 

 Schoharie grit with the Decew- 

 vllle beds of the Upper Oris- 

 kanv of Cayuga, Out. He holds- 

 thai a careful analysis of the fauna may show an intermingling 

 of derived Oriskany with normal Onondaga species. In the list of 

 species from the Scho- 

 hari< given in chapter 

 in 



beds are 

 double 1 



dagger (J). Of the L23 

 Schoharie species only 

 17 arc so far recorded 

 Prom the Decewville 



beds, and of these, L2 are also found in the normal Onondaga. It 

 will be noticed that the cephalopod element is a new feature in 

 the Devonic faunas of North America, and this is so far unknown 

 in the I decewville beds. 



Fiji. 119 Dalmanites anchiops 

 var. a rin at us 



7, those also found 



1 decewville 



designated by a 



"\g.\2Q Proetus or assi margin at us 



