ARTICLE I. 
ADDITIONAL NOTES ON THE CAMBRIAN OF CAPK 
BRETON, WITH DESCRIPTIONS OF 
NEW SPECIES. 
By G. F. Matthew, LL.D., F.R.S.C. 
A visit to the Cambrian areas in Cape Breton during the past 
summer has enabled the writer to supplement his observations on the 
range and structure of the Cambrian System in that island. 
As a full statement of the results of observations in that island in 
this and the two previous years will be embodied in a report to the Geo- 
logical Survey of Canada, only a very brief outline will be given here. 
In consequence bf the finding of trilobites and Cambrian genera of 
Brachiopods, etc., in the Etcheminian strata, the writer proposes to 
revert to the classification of 1889, wherein these deposits are called 
the Basal Series (of the Cambrian System).* 
Further, it has been found that slates with fossils of Cambrian 
genera are included in the important group of volcanic rocks which 
lie at the base of the Etcheminian, and that where the dip of the 
volcanics can be found, as is not infrequently the case, it agrees with 
that of the Etcheminian. It is thought therefore that those volcanics, 
(the Coldbrook group) should be included in the Basal Cambrian. 
Both in New Brunswick and in Cape Breton the Coldbrook group 
begins with lavas showing deposition free of pressure, as they are 
amygdaloidal ; or with agglomerates devoid of evidence of marked 
aqueous wear. The deposition therefore did not begin in deep water, 
or on exposed sea coasts, or under heavy pressure. 
The foundation upon which the volcanics rest shows in several 
places marks of deep sub-aerial decay at the line of contact. Cal- 
careous bands are dissolved, leaving the silicious portion of the strata. 
The feldspar of the granitic rocks is kaolinized, and the magnesian 
Trans. Roy. Soc. Can,, vol, vii, Sec. iv, p. 135. 
