124 
THE GEOLOGIST. 
marks or lines are least discernible, being of much smaller dimen- 
sions, and having a much greater conformity with the natural slopes 
of the hill, ^^hatever loose matter occurs here consists of large 
fragments from the hills above; the natural rock projects in many 
parts of the lines so as to interrupt them, or they are wanting when- 
ever a solid mass of rock occurs in their course. Independently of 
the principal lines, short indistinct traces of others are to be met with. 
Proceeding down the glen, a river enters on the left, equal in size to 
Ihe Roy, and falling into it by a cascade over a rocky bed. Here a 
large series of terraces are found, forming a large terre-plein at top of 
this lower glen. These terraces are of different levels, as may be 
seen in the section and view accompanying this paper. The highest 
of these is on a level with the third principal " road." Successive 
stages of terraces descend to the bed of the river, the bottom of the 
glen being an alluvial flat. The general breadth of the " roads " is 
about sixty feet. Two glens. Glen Turit and Glen Fintec, open into 
Glen Eoy, and on the sides of these " roads " are also seen. It is 
near the opening to Glen Turit, that the third or lowermost line is 
first seen. The following heights are given with others, by Macculloch, 
approximately by barometric measurements : — 
Upper liae (" parallel road ") of Glen Roy above the Western Sea at Loch Eil . 1262 
Above the German Sea 1266 
Lowest line of Glen Roy above the "V^'estern Sea 976 
Upper line above land at Loch Oich 1180 
Lowest line above land at Loich Oich 886 
Upper line above the second in Glen Roy 82 
Second line above the lowest in Glen Roy 212 
Upper line of Glen Roy above the junction of the Roy and Spean 927 
Lowest line of Glen Roy above the junction of the Roy and Spean 683 
Upper line of Glen Roy above Loch Spey 63 
Upper line of Glen Gloy above the Western Sea 1274 
DiflPerence above highest of Glen Roy 12 
Bottom of Glen Roy at upper end above its bottom at the junction of the Roy and 
Spean, or its declivity 644 
Height of Loch Spey above the German Sea 1203 
On the left bank of the Spean, near the junction of the Roy, a Jiiie 
is visible, corresponding to the lowermost line of Glen Eoy. It runs 
about three or four miles, but no corresponding line is found on 
the right bank on the Spean. It finally disappears opposite to 
Teindrish, where the valley is so wide that the opposite lines are four 
miles asunder. Glen Turit is at so great an elevation where it enters 
Glen Roy, as to exclude the two lower lines ; but forms a connection 
