Abstract
Ardsheal Hill is situated in Argyllshire amidst country of great petrographic interest. It is easily reached by road or rail, for it overlooks the main road from Oban to Port William, and is under 2 miles from the station of Kentallen on the Ballachulish Branch of the L.M.S. Railway. The area considered in the present communication is bounded by Loch Linnhe on the west and on the east by the above-mentioned road.