222 Canadian Record of Science. 
(7.) Other Laurentian Organisms. 
In a collection recently acquired by the Peter Redpath 
Museum, from the Laurentian of the Ottawa district, are 
some remarkable cylindrical or elongated conical bodies; 
from one to two inches in diameter, which seem to have 
occurred in connection with beds or nodules of apatite. 
They are composed of an outer thick cylinder of granular, 
dark--coloured pyroxene, with a core or nucleus of white 
felspar; and they show no structure, except that the outer 
cylinder is sometimes marked with radiating rusty bands, 
indicating the decay of radiating plates of pyrite. They 
may possibly have been organisms of the nature of Arch@o- 
cyathus; but such reference must be merely conjectural. 
(8.) Cryptozoum. 
The discovery by Prof. Hall, in the Potsdam formation 
of New York, and by Prof. Winchell in that of Minnesota, 
of the large laminated forms which have been described 
under the above name, has some interest in connection with 
Kozoon. I have found fragments of these bodies in con- 
glomerates of the Quebec group, associated with Middle 
Cambrian fossils; and, whatever their zoological relations, 
it is evident that they occur in the Cambrian rocks under 
the same conditions as Eozoon in the Laurentian. I find 
also in the Laurentian limestones certain laminated forms 
usually referred to Hozoon, but which have thin continuous 
lamine, with spongy porous matter intervening, in the 
manner of Cyptozoum or of Loftusia. Whether these are 
merely Kozoon in a peculiar state of preservation or a 
distinct structure, I cannot at present determine. 
(9.) Continuity and Character of containing Deposits. 
At a time when so many extravagant statements are 
made, more especially by some German petrologists, re- 
specting the older crystalline rocks, it may be proper to 
state that all my recent investigations of the part of system 
