22 THE ROYAL SOCIETY OF CANADA 



Mackenzie by the writer and the geologists of the Imperial Oil Co. 

 Mr. Theodore Link found it in the Bat Hills and on Beaver Tail Mt., 

 the writer in the Carcajou Mt, section. On the Clearwater River 

 E. J, Whittaker secured at the base of the Devonian a fauna which 

 is believed to represent the S. hurtoni fauna, although S. biirloni was 

 not found. A loose specimen of S. hurtoni was found on the Atha- 

 basca by the writer 20 miles above McKay, which, doubtless, 

 originated in the eastern part of the Athabasca basin. 



Stratigraphic Position 



With the extension of our knowledge of the distribution of 5. 

 burtoni has come a pretty clear understanding of the stratigraphic 

 position of this fossil and its associated fauna (Fig. 1). 



Dr. Whiteaves discussed the age and stratigraphic position of 

 S. burtoni in three different papers published in the years 1891 and 

 1892, In the latest of these, which dealt with the Manitoba Devonian 

 faunas,* he states that "the Middle Devonian appears to be repre- 

 sented in this region (Lakes Manitoba and Winnipegosis) by the 

 Stringocephalus zone and the hundred feet or more of fossiliferous 

 dolomite immediately beneath it, and the Upper Devonian by all the 

 beds above the Stringocephalus zone and beneath the Cretaceous." ^ 

 In this paper the Stringocephalus zone of Manitoba is stated to 

 occupy much the same stratigraphic position as the Stringocephalus 

 limestone of Germany and England. No reference is made in it, 

 however, to the 5. burtoni found by McConnell at the Ramparts of 

 the Mackenzie. In his report on the Mackenzie river Devonian the 

 specimens of S. burtoni from the Ramparts had been referred to the 

 Cuboides zone or the horizon which, according to Whiteaves, followed 

 the Stringocephalus fauna in Manitoba. Whiteaves was evidently 

 led to place the Mackenzie and Manitoba specimens of 5. burtoni 

 at different horizons through accepting McConnell's opinion that all 

 of his Mackenzie river fossils were "from the upper part of the middle 

 division" of the Mackenzie river section. The whole of the Mackenzie 

 fauna was treated by Whiteaves as representing "practically the same 

 geological horizon." ^ 



^ J. F, Whiteaves: The Fossils of the Devonian Rocks of the Islands, Shores or 

 Immediate Vicinity of Lakes Manitoba and Winnipegosis. Contr. Can. Pal. 

 Vol. I, Part IV, 1892. 



6 Ibid, p. 357. 



* The Fossils of the Devonian Rocks of the Mackenzie River Basin. Contr. 

 Can. Pal., Vol. I, Pt. Ill, p. 250. 



