in Ihe Middle Region of Scotland. 169 



produced by agents coming from WSW., where the deep 

 glen, the Orchay, is situate, which may once have been the 

 seat of a glacier. I found traces of broad grooves also on 

 two small hills which rise abruptly from the valley, about a 

 mile south from the inn. 



Loch Etive — Arrow 3. — I examined only a small portion 

 of the southern shore of this loch, extending about a mile 

 and a half westward from Connel Ferry. The coast here is 

 formed of basaltic clinkstone, which pushes out a series of 

 salient points, sloping gently to the sea, and each resembling 

 a segment of a discus. They are finely rounded and polished, 

 though the rock is divided into thousands of polygons a few 

 inches broad, by fissures, in which fuci have their roots. I 

 found strife on several of these points, in the space between 

 high and low water, where the smaller fuci grow. They 

 were narrow, about the breadth of straws, but were rendered 

 quite distinct by washing the surface. They were all on 

 that face of each discus vf\)\c\i sloped eastward or south-east- 

 ward, and which was generally more abraded than the face 

 which sloped north-westward. Their bearing surprised me. 

 It was not conformable to the line of the shore — that is, east 

 and west, but ESE. and WNW., as if produced by agents 

 coming from Loch Awe, which is ten miles distant, and 

 divided from Loch Etive here by hills from 300 to 500 feet 

 high. Professor Forbes has shewn, that glacier-ice has a 

 considerable degree of plasticity ; and Agassiz infers, from 

 the occasionally- oblique position of the striae, that it mounts 

 over obstructing masses of rock. Shall we, then, assume, 

 that the basin of Loch Awe was filled with it to the height 

 of 1000 feet, and that a portion of it might find its way over 

 the broad hilly barrier in this direction % The facts yet 

 observed are inadequate to support such a conclusion ; but I 

 give them as they presented themselves. 



Loch Leven — Arrow 2. — About a mile westward of Bala- 

 hulish Ferry are two small outliers of the granite mountain, 

 wliich skirts the shore there. They are about 80 feet long, 

 and rise about 6 feet above the high water level. The eastern 

 has the sea on three sides, the western is an island at high 

 water. 



