120 NEW YORK STATE MUSEUM 



species above listed, abounding in full address, companioned by an 

 entourage which, in part, elsewhere accompanies the Oriskany, but 

 also in part showing forth the Helderberg fauna in the dress of 

 later evolution. Here, I take it (and have endeavored to give the 

 demonstration in full) in these lime seas this northern Oriskany or 

 sandstone fauna of Appalachia took its origin and thence it traveled 

 southward through the open rias of that ancient coast into the 

 seas within the Appalachian barriers. Here, then, was a wide open 

 channel inward, in the northernmost of these Appalachian passages, 

 and with the inward movement of the fauna came its differentia- 

 tion and slow adjustment to the shoal waters. 



In obvious contrast to this southwestern movement of the true 

 Appalachian Oriskany faunas was the migration through the parallel 

 channels of this northeast region lying farther to the south, one 

 where now the Bay Chaleur indents the Gaspe coast and perhaps 

 along others which lay between this and that equally ancient passage, 

 the Bay of Fundy. 



These are indicated by the wholly arenaceous early Devonic beds 

 stretching across the state of Maine from Aroostook county on the 

 east through Piscataquis and Penobscot counties to Somerset on the 

 west. In all these shallow water channels there is a persistent and 

 well-defined element of the Coblentzian faunas which enforces the 

 contrast between them and the normal or standard Oriskany of 

 New York. 



The case of the Gaspe sandstone. The Gaspe sandstone is a 

 unit of still somewhat uncertain limitations in stratigraphy, though 

 its base is definitely understood and lies at a small unconformity 

 with the Lower Devonic limestones. This evidence is taken wholly 

 from the thinned northern edges of the sandstone mantle on Gaspe 

 bay. Southward the horizontal development of the sandstones is 

 apparently and perhaps, in places, obviously continuous in their 

 upper part with the lower masses of sand and conglomerate which 

 enter into the composition of the formation on the Gaspe peninsula 

 known as the " Bonaventure," a term which appears to be correctly 

 interpreted as Devono-Carbonic, in the sense that it embraces 

 locally and throughout the region of its typical developments from 

 Bonaventure island southward, a series of essentially continental 

 deposits unconformably succeeding the marine Middle Devonic. 

 The Gaspe sandstones of Gaspe bay contain a marine fauna which 

 carries certain Oriskany species, Ixrnssrlarria OVOtdes (gaspensis), 



Eatonia peculiaris, survivors of the Grande Greve fauna beneath. 



but the majority of species in the assemblage, the pelecypods and 



