36 F 
EKWAX lUVEFi 
Devonian 
rocks coil fined 
to Bontlieni 
part of James 
oay. 
Devonian but Silurian and that the .species brought from the Att^vwa- 
piskat river were in a great measure duplicated in thi.s collection. 
It .seems therefore certain that the Devonian rocks are conlined to 
the southern part of .James bay and the adjacent country, e.Klending a 
short distanot! north of the Albany river. On the Severn river .Mr. 
r.ow collected fossils which appear to be of .Silurian .age. 
The section of the Kkwan apj)ears to be nearly horizontal, or the 
beds e.\pfiSod in .aseending the stream seem to bo in an ascending 
sSeries. The first appearance of the underlying rock.s noted in ascend- 
ing the stream is a colouration in the bouMer clay, pr<ibab'.y from a 
red .shale in the bod of the river ICxposiirea of lliis were not .seen, but 
higher up at the tir.st heavy rapid, lime.stone of a gray to whitish 
colour in lumpy bods outcrops both below and at the rapid. The beds 
are very h.ird and dolomitic .and contain very few fossils. At the next 
rapid the bed.s are yellowish and appear in thinner l.iyers and uf finer 
grain. The thickness exposed at both these rapid.s does not ajipoar 
to be of any great amount, ])robably not over 2d feet. 
The exposure at the port.age Is of a veiy irregularly l)eilded lime- 
.stone, owing to the presence of large masses of porous or coralline 
form.ation, which has forn ed a very irregular .stirfaee for the .succeed- 
ing layer which in conseriuence .seems contorted. I’.elow the coralline 
mass the Inals are thin and of fine texture. The general colour is a 
grayish white and the rock is hard, lough and ma.ssive, ami con- 
tains a greater variety of fo.s.sils than at any of the other expo- 
sures. Lists of the .specie.s found at the.se several rapids are given 
in the general descriptions for the localities. All the exposures 
at the rapitl.s abo\e this have n very .similar appearance, except that in 
the exposures near the last rapiil of this series tlie l.>wer beds are frag- 
mental, or brejik with .a lumpy surf.aco and an? ash gray in colour. 
Above the.se are yellow beds, in wbi« h tliere are nuinerous irregular 
cavitie.s. The ashy coloured beds bear a very strong resemblance to 
the Devonian rock.s of the south .shore, of Lake Winnipegosis, but do 
not hold difTvrent fos.sils from tho.se at the portage on this river. 
'I'he yellow bed.s whicli are full of cavitie.s are similar to rocks of 
Siluritan age on Cedar lake in the Saskatchewan district. 
Other exposures of these beds occur to the north of the Cambrian 
rocks of .Sutton .Mill lake.s, and are found very near them .so that the 
C 'litinuity of the series around this mass both by the south to the 
Sevei’n river and to the east by the coast is almost certain. On the 
extreme end of the eastern point at Cape Henrietta Maria, our Indian 
