REPORTS ON EXCURSIONS. 263 



Creag-na-Caillich, Killix, 22nd June, 1901.— A joint excur- 

 sion of the Natural Histoiy and Geological Societies of Glas- 

 gow was made to this locality under the leadership of Mr. 

 Peter Macnair. The mountain is situated at the western end of 

 Loch Tay, and rises to an elevation of 2,990 feet above sea level, 

 immediately to the north of the village of Killin. It has long 

 been famous in the annals of Scottish botany, being often men- 

 tioned in Lightfoot's Flora Scotica as most probably the locality 

 where Stuart, the minister of Killin, first gathered the Alpine 

 plants of Scotland. Geologically, it has also been known for a 

 considerable period, a short account of its mineral wealth having 

 been published in 1814 in the Transactioiis of the Geological 

 Society of London by that pioneer in Scottish geology, Maccul- 

 loch. In this paper he refers to the occuiTence of that com- 

 paratively rare British mineral — rutile — among the schists 

 capping the summit of this mountain, and from that period we 

 always find it given in English text-books. 



On the party aniving at Loch Tay pier, the conductor first 

 explained the geological structure seen at the base of the moun- 

 tain. Fine sections were seen of the Loch Tay limestone and its 

 accompanying altered basic rocks. The party also examined 

 the old yew trees at Finlarig, whilst a number of interesting 

 plants were noted amongst the thick undergrowth which covers 

 this part of the Loch side. Ascending from the loch to the 

 Kenmore Eoad, a number of interesting sections in the lime- 

 s-tone at Drum-na-Larig were noted. Mr. Macnair pointed out 

 that at this point the limestones had been extremely folded, the 

 axes of the folds hading towards the N.W., and the overfolding 

 being consequently towards the S.E. The under limbs of the 

 folds are distinctly thinned, and the whole evidence goes to show 

 that the thrust lias been from the N.W. 



After a slight refreshment, the actual ascent of the mountain 

 began, the route being by the stream which enters the Lochay 

 near the inn. At fu-st the track leads across the limestones, the 

 mountain stream having at this point cut a deep gorge in these 

 rocks. The botany of this gorge has been well worked out by Mr. 

 D. Haggard. Proceeding up the mountain side, a halt was made 

 to examine some fine sections of the gametiferous mica schists 

 which overlie the Loch Tay lunestone. At certain points the 



