586 Proceedings of the Royal Society 
and Ivaim, striated rocks occur, almost all of which present surfaces 
towards the X.W. Fig. 8, plate XIX., gives an example of one of 
these rocks. It slopes down X. by W. at an angle from 60° to 70°. 
The striae upon it run E. and W., dipping down east at an angle of 
20°. In one part of the surface there is a hollow, A, over which the 
striating agent has passed without marking its sides. The striating 
agent had moved from the west, as the striae were deepest at their 
west ends. 
8. Arclrishaig . — This place is on Loch Gilp, a small branch from 
Loch Fyne. There are hills here on the west side of Loch Gilp 
which rise to a height of from 700 to 800 feet. Fig. 1, plate XVIIL, 
gives a bird’s-eye sketch of the loch and these hills. Xo. 1 is the 
town of Ardrishaig. Xo. 2 is Loch Gilphead. A lateral valley 
comes down from the S.W. marked AB. 
At a and b many of the rocks (a sort of clay slate) are (at a height 
of 420 feet above the sea) well smoothed, the smooth faces being 
parallel with the axis of the loch, which here runs about X. and S. 
The smoothing had evidently come from the north. On reaching 
cc?, at a height of 600 feet above the sea, the smoothed rocks were 
more abundant, and evidently from the same direction. 
A Boulder of dark-coloured granite, 12x6x4 feet, was found 
between ab and cd , whose position implied transport from the 
north. 
At a height of from 500 to 600 feet between a and c there are 
numerous whinstone knolls, sloping down towards the north as indi- 
cated on fig. 2, plate XVIII., beautifully smoothed and polished on the 
north sides, but rough and precipitous on the south sides. On some 
of them a few boulders were lying, evidently intercepted in their 
farther progress southward by these knolls, because on the south 
side there were numbers of boulders which, having been pushed 
over, had remained there, as shown in the figure. 
At one place indicated on the sketch, fig. 1, plate XVIII., by the 
letter e, a smoothed rock was met with sldping down S.E. by S. at 
an angle of 35°. Two sets of striae were on it, one running X.W. 
by W., the other running X.E. and S.W. 
This spot was very near the corner where the lateral valley AB 
joins the main valley of Loch Gilp. The two sets of striae indicated 
of course two several currents, one apparently parallel with the axis 
