Acadian and St. Lawrence Water-shed. 409 
obtained in them, it is conjectured that they are more recent 
than the latter. In this case they can not be far removed 
in age from the rocks of Mount Wissick, and are perhaps 
to be regarded as the equivalents of the latter, deposited 
under somewhat different conditions. 
Applying now the key thus afforded, we find that the 
succession of rocks constituting the first of the above 
divisions, that of Mount Wissick, is but repeated, with 
eventually the same character and fossils, and with th® 
same low dip all around the northern margin of the Silurian 
tract, from Rimouski to Lake Metapedia, and eastward into 
the interior of the Gaspé peninsula. So, similarly, to the 
southward of these strata, we find the country drained by 
the Restigouche and its tributaries, the Quatawamkedge- 
wick, the Patapedia and the Metapedia, everywhere occu- 
pied by slates similar to those of the lower part of Lake 
Temiscouata and the Madawaska. At no point, however, 
distant from the lake, has anything been observed corres- 
ponding to any portion of the intermediate division, which 
must accordingly either be wholly wanting or concealed 
from view by the superposition of the higher and uncon- 
formable members of the system. In New Brunswick the 
slates are also predominant, being the prevailing rock 
through all the northern counties, though sometimes be- 
coming so calcareous as to constitute true limestones, but 
with these, at a few points, are also found beds which 
appear to represent the inferior group. Thus on the Siegas 
River, in Victoria county, where the beds are nearly vertical, 
the slates are accompanied, first, by a coarse and very 
peculiar conglomerate (holding elongated, curved and dis- 
rupted pebbles of limestone, mingled with others of serpen- 
tine), and, secondly, by beds of sandstone not unlike 
those of Point aux Trembles, and carrying fossils indicative 
of a similar horizon, Again, on the Beccaguimee River in 
Carleton county, on the extreme southern edge of the 
Silurian tract, the succession of beds bears much resem- 
blance to that observed near its northern edge, and again 
holds similar organic remains, while, finally, it is possible 
