Geological Notes. 387 
series. Whether any of the series of crystalline bedded 
rocks associated with the typical Lower Laurentian west 
of Lake Superior and in New Brunswick represent in time 
these eruptive masses of Anothosite remains as yet uncer- 
tain though it seems plain that some of them belong to the 
seemingly long interval between the Laurentian and the’ 
Huronian. For the present, however, the Middle Lauren- 
tian or Grenville series may in the Ottawa district be re- 
garded as the Upper Laurentian. 
2. The Torridonian sandstones and associated beds in 
Scotland seem to occupy a position corresponding to that 
of the Huronian in Canada, and resemble them in mineral 
character and in the few fossils which they contain. 
3. The so-called Dalradian series in Scotland is apparent- 
ly of uncertain age; but in Ireland it would seem that a 
similar series holds conglomerates with pebbles of the older 
gneiss, precisely as the Canadian slate conglomerate does. 
This also may represent the Huronian or the series ap- 
proaching to it in age or constituting the upper part which 
Hunt has named T'aconian. 
4. The Uriconian and Longmyndian of England and 
Wales may also, as Geikie suggests, be in part Huronian, 
or equivalents of the Scottish Dalradian. Specimens of 
these rocks which I have studied leave the impression that 
lithologically they may admit of this reference. 
5. There remains, however, much probability that equi- 
valents of the remarkable Kewenian series of North 
America may be included in the latter formations; in 
which case as in Canada, they may admit of distinct separa- 
tion as an Upper Huronian or possibly as a downward ex- 
tension of the Basal Cambrian. 
6. It is evident that in Great Britain, as in Canad’ the 
Laurentian rocks had been elevated into land before the 
Huronian period; and that the latter with the Kewenian 
constitute littoral formations of coarse clastic material and 
volcanic ejections following the lines of the old Laurentian 
coast and constituting the oldest members of those great 
sedimentary formations which reach upward continuously 
