214 Scientific Intelligence. 
found within a few years in the Cambrian rocks of Britain—till 
ll 
because of the position and the occurrence of fossils. The 
nian is not a formation of known age. e original Huronian 
have been so pronounced on lithological evidence; whic 
evidence at all, since the kinds of the Huronian are not confined 
to it. 
(3.) Canadian Period.—The fact of the existence of an impor- 
tant Lower Silurian formation in Canada, near Quebec, abounding 
in fossils, and of about the age of thé Calciferous sand-rock and 
the Chazy limestone, is mentioned, in the first edition of this 
The change has been made to “ Cincinnati” group in the recent 
geological reports on the surveys of States west of Set York, and 
this term was accordingly adopted in the Geology. 
