370 
BATHYMETRICAL SURVEY OF 
end, and tapering all the way to the outflow. Half a mile from the 
north end a rocky promontory, the Rudha Ceann Ard Thonnaich, 
constricts the loch, but there is no shallowing in the narrows, where 
the depth is well over 200 feet. The basin is quite simple, all the 
contours approximately following the shore-line. The steep slope of 
the hills is continued under water, and there is in most parts but little 
beach. The axis of the loch is slightly curved, and the line of greatest 
depth is nearer the west shore. The area over 400 feet deep is very 
narrow, about 2 miles in length, and at both ends comes very close to 
the west side, the steepest slopes in the loch being at these points. The 
PIG. 56. LOCH TEEIG. 
(Photograph by Mr. T. N. Johnston, M.B., C.M., F.R.S.p.) 
cross-sections in the middle parts of the loch, as at C-D on the map, 
only show slightly the U -shape which distinguishes glacier-hollowed 
lochs. The valley is so narrow, relatively to the depth of the loch, 
that the steep slopes reach far towards the middle, and leave but little 
comparatively level bottom. Towards the south end, where the loch 
is broader, and the depth less (from 200 to a little over 300 feet), there 
is a greater extent of nearly flat bottom, and the U -section is more 
clearly marked. The approximate areas between the consecutive 
ct5ntours at intervals of 100 feet, and the percentages to the total area 
of the loch , are given in the following table : — 
