in Scotland and Parts of England. 241 



In Scotland, the mountain systems are too large to allow 

 of our seeing any such well-defined examples of what may 

 be called District Glaciation, as those cited from South 

 Britain. The memorials of the action of ancient ice are, as 

 is well known, abundant in our land of mountain and flood ; 

 and we shall presently endeavour to embrace them in a com- 

 prehensive sketch ; but I am unable to select any particular 

 district precisely comparable to the Lake country or the 

 Snowdonian region, although, as has been seen, there are in 

 various places proofs of still more narrowly local glaciation. 

 It is, also, to be remarked that there are in several district 

 yalleys in Scotland, proofs of local glaciation on a larger 

 scale than those already mentioned ; but these I shall advert 

 to in the comprehensive sketch which must now be at- 

 tempted. 



Proofs of a more General Glaciation in Scotland. 

 The examples of smoothed and striated rocks in Scotland, 

 known up to 1 849, were summed in an interesting paper by 

 Mr Maclaren, read before this Society in April of that year. 

 They were very numerous. He redescribed the remarkable 

 example in Gairloch, originally discovered by himself in 

 1845. Instances were also cited from the neighbouring 

 valleys of Loch Long, Loch Eck, and Loch Fyne ; the direc- 

 tion of striae being in all instances conformable to the direc- 

 tion of the valleys, namely, in the first three cases from 

 NNW., and in the last NNE. Mr Maclaren described 

 striated rocks in the valleys of Loch Earn and Loch Katrine, 

 strise directed from the west ; along Loch Lubnaig, directed 

 from the north; along the skirts of Demyat hill, and at Tor- 

 wood, in the valley of the Forth, pointing from WNW. ; 

 and at numerous places in the lower parts of the valley of 

 the Forth, about Edinburgh, and on the Pentland Hills, 

 pointing generally from WSW. Our learned associate 

 also adduced examples of the same phenomena, from the 

 east end of Loch Awe in Argyleshire, from Loch Etive near 

 Oban, from Loch Leven at Ballachulish, and from Glen 

 Spean near Fort William, where the exposed sides were 

 clearly towards the east, and the smoothing agent had of 



