310 Canadian Record of Science. 
brachiopodous genera Acrothele, Lingulella and Linnarssonia, 
are not uncommon, and the species are the same as found 
in the Paradoxides beds above. 
There is thus, in Band b, an entomostracan fauna of six 
species, as well as two trilobites which resemble those of 
the Olenellus beds in Sweden, but so far, no example of 
Olenellus itself or its kindred genera. Band 6 has a thick- 
ness of 170 feet, and Band a of 200 feet, s0 we may suppose 
these measures at the base of the St. John Group, are very 
near the horizon of Olenellus. 
If we were to be guided by the indications given by the 
Scandinavian faunas, we would place the Olenellus beds as 
a stage only, below the Paradoxides beds, and would not 
consider them worthy to rank as a series: but if we regard 
the great development of the measures containing Olenel- 
lus on the Pacific slope of the continent, we cannot refuse 
to accord to them the latter grade. It is a series which ap- 
pears to overlap that containing Paradoxides, but which in 
its commencement assuredly had a higher antiquity. 
The author would, therefore, now arrange the Cambrian 
System, as it occurs in Acadia, as follows :— 
Localities. 
D.—Upper Cambrian System (Potsdam series)... Unknown. 
Ge iiddle ns Acadian Series,......... St. John, &e. 
B.—Lower Cambrian, Georgian Series,.......... C. Breton. 
A.—Basal Cambrian, Etcheminian Series,....... St. John, &e. 
The relation of the two latter series has not been clearly 
shown, but the observations thus far made in New Bruns- 
wick, and Newfoundland, agree with the scheme above pre- 
sented. 
3. On the relations of the Olenellus faunas of the Pacific 
Slope in North America. 
The Olenellus fauna which we have been considering is 
not the full development of this fauna as known in the 
West. 
