Some Canadian Rocks containing Scapolite. 201 
The pyrite, epidote and sphene occur in small amount in 
little irregular shaped grains. 
The other two specimens contain no biotite, but hold a 
certain amount of quartz, recognized by the absence of 
cleavage and decomposition products and by its uniaxial 
and positive character. The quartz grains are sometimes 
broken, but do not show much evidence of pressure either. 
The specimen collected about a quarter of a mile below 
Arnprior contains a considerable amount of quartz, while 
that from two and a quarter miles below, holds less quartz, 
and contains, in addition to the pyrite, a little magnetite or 
ilmenite. 
To sum up, therefore, it may be said :— 
(1) That the Scapolite Diorite, which in Norway occurs 
so intimately associated with the apatite deposits, does not 
occupy the same relation to the Canadian deposits, 
‘ (2) That its place in Canada is taken by certain pyrox- 
enic rocks which have not, as yet, been thoroughly studied. 
(3) That Scapolite Diorite and transition rocks between 
it and gabbro, identical with the Norwegian rocks, do occur 
in our Laurentian System, associated with amphibolites 
and crystalline limestones. 
Eozoon CANADENSE. 
By Sir J. Wiu1am Dawsoy, F.R.S., ete. 
{Extracts from a memoir by Sir William Dawson in the Publieations of the 
Peter Redpath Museum, Sept., 1888.] 
I, STATE OF PRESERVATION. 
We may first ask, under this head, what are the structures 
supposed to be preserved. On the supposition that Hozoon 
was 4 marine organism, its test or hard part, which grew on 
the sea bottom, consisted of a series of calcareous lamin, 
not perfectly parallel, but bending towards each other at 
intervals, and uniting so as to form flattened chambers, 
deeper toward the base and becoming shallower in the 
upper part, while at the top they sometimes become broken 
up into rounded cells or chamberlets, constituting an 
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