252 THE DEVONIAN FOSSILS OF CANADA WEST. 
must have constituted four-fifths in bulk of the whole fauna of the 
period. In England and in Germany, the grand coralline horizon of 
the Devonian era lies in the middle of the series. The fauna of the 
Corniferous Limestone and Hamilton Shales would therefore appear 
to be more nearly related to the middle than to the lower Devonian 
of Europe. Such is the position assigned to them in the third 
edition of Sir Roderick Murchison’s noble work, Siluria. But if it 
can be shewn that the coralline beds of Canada include the Schoharie 
Grit of New York (as I strongly suspect they do), then this latter 
formation must also be added to the middle Devonian. On this latter 
point, however, I can give no positive opinion, as the fossils of the 
Sehoharie Grit of New York are totally unknown to the scientific 
world. 
The following may be given as a table shewing approximately the 
position of the different American sub-divisions of the Devonian 
system, as indicated by the evidence of the fossil corals : 
Old Red Sandstone, or 
Catskill Group ...... ) 
Chemung Group........... 
Wala DEVONIAN. 
Portage Gropp seth sale aie wills ed 
Geneseer slate: asi eM Hana: vita aun 
Tully Limestone ......... 
Evamal fom (Group ye oh) Wee eele eos ec 
Marcellus Shale .................. ) Mrppie Devonian. 
Corniferous Limestone 
Onondaga Limestone .............. 
DchohamenGrite, 0 Mee kei a ak 
Canda-calli Grit, ose eS ee 
; sc" * \ Lower Devontran. 
Oriskany Sandstone vues yee... } 
It is important to observe, that in Gaspé we find some of the cha- 
racteristic fossils of the Oriskany Sandstone intermingled in the same 
beds with those of the Upper Pentamerus Limestone, and therefore 
it may be that when these Gaspé rocks are studied, we shall find it 
difficult to. draw the line between the Lower Devonian and the Lower 
Helderberg. 
