584 Proceedings of the Royal Society 
which faced N..N.E., being the direction in which Loch Etive 
lies. 
I remembered that in walking up from Loch Awe on this 
occasion, I had seen several smoothed rocks with strise running 
much in the same direction, but I omitted to take the exact bearings. 
I felt surprised at this direction, as, when last year in the Hebrides 
and the west coast of Argyleshire, I had been accustomed to see 
that H.W. was the usual direction both of boulder transport and of 
rock striations. 
7. This N.JST.E. direction of transport appears, however, to charac- 
terise all the boulders and the rock striation at the Gareloch , Loch 
Gair, and Locli Awe. It will be observed that these places form a 
band or line across the country about N.N.E. and S.S.W. It is no 
doubt premature to theorise on so small a number of facts recorded 
in these notes. But they seem to suggest that in this district there 
may have been a current of floating ice, moving in a S.S.W. direc- 
tion, dropping boulders where the ice which bore them was stranded 
or obstructed. 
Is it not probable that, when the Highlands of Scotland were 
covered by the sea, up to a height of say 2000 feet, and when they 
presented an archipelago of islands, there may have been currents 
moving in different directions, and these directions changing as the 
sea fell from one level to another ? 
The valley through which the Highland Kailway passes, between 
Killin and Dalmally , presents, on the sides facing and sloping down 
to the north, many examples of large boulders and striated rocks, 
which, even from a railway carriage, are seen to be well- deserving of 
special investigation. Thus at Luib station, and for some miles both 
to the east and west of it, there are numerous large boulders resting 
on the hill sides sloping down to the north ; as also great masses of 
boulder-clay and water-borne gravel, with huge boulders, and occa- 
sionally under these beds, surfaces of rock, well smoothed and 
striated. A special examination of this district would be rewarded 
by many important discoveries. Similar features occur at and 
near Crianlarich and Tyndrum. But at Tyndrum, while there 
are knolls and escars of gravel, so numerous indeed that they 
have given a name to the place (in Gaelic),* there is a sudden 
* Tigh, dwelling ; Brum, ridge or back. 
