72 Canadian Record of Science. 
deal Fauna by biological links. Such is the Regio Fucoida- 
rum of Angelin in Sweden, and the Caerfai Group in Wales. 
The process of unfolding the faunas of these initial terreins 
and stages of the Cambrian is now in progress, and has 
already given some remarkable results, both in Kurope and 
America. 
Applying these data to the classification of the Cambrian 
System in Acadia and Newfoundland, we find indications 
of the following series :— 
Series A.—The Basal Series, or Eteminian.' 
“ _B.—The St. John Group, or Acadian. 
‘¢ C.—The Lower Potsdam, or Georgian. 
‘‘  D.—The Potsdam Sandstone and Limestone. 
Srerizs A. 
The terreins which in Newfoundland and Hurope are 
supposed to be of equal age with this series, have been de- 
scribed in the previous paper. 
There are, however, in America, further west, formations 
(terreins) that have been described by geologists as pre- 
Cambrian, some of which may be of equal age with this 
series. But as the Series B. has not been recognized in 
the central and western parts of North America, and these 
terreins have not yielded distinctive fossils, the means of 
determining their relation to the Hteminian Series are 
wanting. 
Such formations are the Kewenawan and Animiki of 
Lake Superior, and the Chuar Group and underlying strata 
west of the Rocky Mountains. Messrs. Hague and Walcott 
were at first disposed to class the Chuar Group as Cambrian, 
but the latter now thinks it is of greater antiquity. 
In the Lake Superior region no fauna older than that of 
the St. Peter’s Sandstone has been established; so there re- 
mains the whole range of the Cambrian, as well as possibili- 
1 Named from the Etchemins, the aborigines of New Brunswick 
and Maine. 
