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THE ROYAL SOCIETY OF CANADA 



ontology at Queen's University, to prepare a report on the Devonian 

 of Southwestern Ontario. The results of his investigations appear 

 in Memoir 35, 1915, of the Geological Survey. Complete lists of 

 fossils from all the more important exposures are given and a revision 

 of the stratigraphy as follows: — • 



STAUFFER S CLASSIFICATION OF THE DEVONIAN OF ONTARIO 



Upper Devonian 



Middle Devonian 



Lower Devonian 



Port Lambton beds (probably Portage and 



Chemung) 

 Huron shale (probably Genesee shale) 



Ipperwash limestone 



Hamilton formation 



Delaware limestone 

 Onondaga limestone 



Petrolia shale 

 Widder beds 

 Olentangy shale 



f Onondaga limestone 

 I Springvale sandstone 

 I (local faciès) 



Oriskany sandstone 



Helderbergian (wanting or possibly repre- 

 sented, in part, by the Detroit River series) 



The Silurian of the southwestern peninsula was studied by M. Y. 

 Williams and an exhaustive report published as Memoir 111, in 1919. 

 The report contains many faunal lists, and descriptions of a few new 

 forms. Of chief impoi tance is the recognition of many of the Ameri- 

 can subdivisions and a good correlation table. The Sylvania sand- 

 stone and Upper Monroe of Grabau and Scherzer are removed to the 

 Devonian. The section on the Niagara river which is indicative of 

 the general advance in stratigraphy since 1863, is given below: — ■ 



WILLIAMS CLASSIFICATION OF THE SILURIAN OF ONTARIO 



Devonian 



Silurian 



Cayugan Group 



Akron Akron dolomite 



Bertie Bertie waterlime 



Salina Camillus shale 



Guelph 



Guelph dolomite 



