Proceedings of Royal Society of Canada. 161 
dian Northwest, and in some years caused heavy losses in 
many parts of that great wheat growing territory. 
“The fertility of the Ladoga wheat is said to be very satis- 
factory, the average yield from all the returns received being 
57ibs from the 3ibs ot seed, or nineteen fold. 
“The quality of the wheat, which is a point of the utmost 
importance, is being carefully investigated and the evidence 
thus far obtained on this point is on the whole very satis- 
factory. Fuller information will be given in the next bulletin 
to be issued from the central experimental farm. Besides 
a second supply of Ladoga wheat there has been imported 
this year a variety of wheat known as Onega, from lat. 62° ; 
barley from lat. 66°, and both barley and rye from lat. 67°. 
These latter are believed to be from the extreme northern 
limits at which cereals are grown in Kurope in a continental 
climate. Early ripening cereals are also being songht from 
other countries, and it is hoped that by persevering effort 
in this direction, varieties will eventually be obtained which 
will ripen sufficiently early to relieve the settler in the 
more frosty districts from the discouragements experienced 
in the past, and result in extending the limits of the success- 
ful cultivation of cereals in Canada, and that thus the ex- 
perimental farms may become an important aid in the 
settlement of these distant parts of the Dominion.” 
On some remarkable Organisms of the Silurian and Lower 
Devonian Rocks of Acadia.* 
By G. F. Marrnnw, F.G.S. 
“In this paper are described three crustaceans and the 
Pteraspidian fish (Diplaspis Acadica), of which latter preli- 
minary descriptions have been given in the CANADIAN 
Record or Science and in the Bulletin of the Natural His- 
tory Society of New Brunswick. Further particulars are 
given, and figures showing the form, ornamentation and 
arrangement of the plates forming the dorsal and ventral 
armour of the fish. The species is compared with other 
