74 Canadian Record of Science. 
Basin grey flags, which overlie the Ctenopyge beds, 
but no higher stage than the Olenus Zone has been 
established by fossils. 
Series C. 
This, the ‘‘ Lower Potsdam” of Billings, or “Georgian” 
of Mr. Walcott, has not been recognized on the main land 
of Acadia, but is found in the island of Cape Breton, where 
the fossils are Bathyurus (sub-gen ?), Orthisina, Orthis, Hyo 
lithes princeps. 
We place this series provisionally above the Series B. for 
reasons that will appear in the sequel, but a few considera- 
tions militating against this view may be mentioned. 
Mr. A. Murray, late provincial geologist of Newfound- 
land, in his reports and sections of the Cambrian formation 
in the peninsula of Avalon, in that island,’ places the lime- 
stone beds of Topsail Head and Brigus, in Conception Bay, 
below the Paradoxides beds. But, perhaps, it would be 
more correct to say that this limestone, by his observations, 
appears to be included in the Paradoxides Zone, as the 
horizon of Conocoryphe at Manuel Brook, not mentioned 
by him, is found below the limestone.?, Mr. Walcott asserts 
that the fossils of this limestone belong to his Middle Cam- 
brian or Georgian fauna, and explains the anomaly of their 
presence in the Paradoxides measures of Conception Bay, 
on the ground that they form an unconformable overlying 
series.” 
Dr. W. C. Brégger, of Stockholm, in his review of the 
“ Kureka Paleontology,” urges several reasons for regard- 
ing the Georgian series as older than the Acadian.* Some of 
these reasons will be referred to hereafter, in connection 
with the genus Olenellus, but one may be mentioned here. 
1 Geol. Survey of Newfoundland, London, 1881, pp. 2388 and 239. 
? Mr. Murray includes in his section the conglomerate of Manual 
Brook, which is immediately below the Concorphe shale. 
> U. States Geol. Survey, Bull 30, p. 49. 
*Om alderen af Olenelluszonen i Nord Amerika, p. 195, &e. 
