Some Canadian Rocks containing Scapolite. 189 
bedding, but is often a good deal jointed. Its aspect, when 
the pyroxene is of a dark colour, is often that of a massive 
eruptive rock.’ It is very intimately associated with the 
apatite, in some places apparently passing imperceptibly 
into it. 
In order to ascertain whether these pyroxenites con- 
tained any scapolite, two specimens—one from lots 35 and 
36, range V. of Portland West, and the other from the well- 
known McLaurin Mine in Templeton—were sliced and 
examined microscopically. They are both rather coarse- 
grained, that from Portland being of a light greyish colour 
and holding a little disseminated apatite, sphene and pyr 
ite, while the Templeton rock is light green in colour, and 
in certain places contains a good deal of biotite. Neither 
of them contained any scapolite, nor could any be found in 
the wall rock of the Emerald Mine in the township of 
Buckingham. 
Mr. Coste, Mining Engineer to the Geological Survey of 
Canada, who has had occasion to visit a number of the apatite 
mines, considers that the apatite occurs in the form of more or 
less irregular veins, the above mentioned pyroxene rocks 
occupying the position of vein stones. He also believes that 
these veins of apatite and pyroxenite are found almost invari- 
ably in connection with a certain eruptive rock, which varies 
much in texture but is generally rather coarse-grained, and 
which is composed largely of orthoclase generally having a 
bluish or lilac tint. Two specimens of this rock, collected 
by Mr. Coste,—one from the “Star Hill Mine,” range 
VIL, Portland West, in the Province of Quebec, and the 
other from the “ Blessington Mine,” lots 29 and 30, range 
I., Inchinbrooke, in the Province of Ontario,—were also 
sliced and examined. The two rocks resemble one another 
in appearance, that from the *‘ Blessington Mine,” however, 
being somewhat darker in colour. 
Under the microscope, the “Star Hill” rock is seen to 
be composed essentially of orthoclase and biotite, with very 
small amounts of magnetite and pyrite. ‘The orthoclase is 
almost always clear and fresh; the biotite is also very 
