THE MINERALOGY OF SCOTLAND. 439 
bourhood of Fortingall, passes south-westward, and reaches the ocean verge 
about Loch Killisport, and the island of Gigha. 
It is in the less schistose—the most felspathic and highly convoluted por- 
tions of this rock—that the mineral occurs; where the quartz segregates in veins, 
with a more or less crystalline separation of the felspar, and a nodose segrega- 
tion of chlorite in matted flaky crystals. 
Where the quartz becomes stained with yellow, and, above all, where it is 
hyaline and of a purplish-brown colour, the ilmenite may be expected, with 
rutile, as a not infrequent associate. 
The following are some of the localities in which the writer has found | 
ilmenite in this belt of rock, tracing it from east to west. 
In quartz, upon the east slope of the summit of a hill, 3240 feet high, which 
lies about a mile immediately to the south of Carn Marig, in Perthshire. 
In quartz with chlorite, near Loch-na-Chat, at the east foot of Meall 
Garabh, Ben Lawers. 
With chlorite, at the foot of Craig-an-Lochan, of Meall-nan-Tarmachan. 
On the summit of Craig Cailliach, with rutile in quartz. 
In brown hyaline quartz, with chlorite, on the north side of the Mid Hill, 
—and near Corrycharmaig, on the north slopes of Craig Mohr. 
On the north-east side of Stob Luib. 
About 300 feet from the summit of Ben More, on the north side, with 
chlorite in quartz. 
On the south-east side of the summit of Am Binnean, in hyaline quartz. 
In the southern rocky corries on the south side of the summit of Stob 
Garabh, with chlorite in quartz. 
Near the summit of Cruach Arden. 
On Meall Damph, in quartz. 
On the south slope of the summit of Ben-a- Chasteal of Glen Falloch, with 
chlorite. 
Ben-a-Chabhair, south side, with chlorite and quartz. 
In quartz with chlorite, in a quarry on the north side of the road from 
Loch Lomond to Arrochar. 
On the north-west slopes of Ben Ime, in quartz, in large foliated crystals, 
with chlorite. Their form is that of the figure. I have 
found plates of the mineral on this hill, three inches by 
two, and a quarter of an inch in thickness. poe 
On Crois. 
On the south side of the square pillar of the Cobbler, with rutile and chlorite. 
On Ben Lochan, in quartz. 
In the great rents on the summit of Ben Bheula, with rutile and chlorite. 
