380 
BATHYMETRICAL SURVEY OF 
follows a winding course of about 6 miles, and pours its waters into the 
Moray firth. Besides these, there 'are many shorter streams and burns 
flowing directly into Loch Ness, or into the tributary rivers or lochs. 
As will be seen from the summary table, the staff of the Lake Survey 
sounded thirty-three lochs within the Ness basin, while a number of 
small lochs could not be surveyed for lack of facilities. These lochs 
vary in size, from the little Loch nan Losganan, covering an area of 
only 7 acres, and containing only a million cubic feet of water, to the 
FIG. 58. INDEX MAP OF THE NESS BASIN. 
mighty Loch Ness, covering an area exceeding 20 square miles, and 
containing many thousands of millions of cubic feet of water. None of 
the other lochs in the basin can be compared with Loch Ness, neither as 
regards area, volume, nor depth, but still a few of the lochs are of 
considerable importance. For instance. Loch Quoich is 7 miles in 
length, while Loch Garry and Loch Mhor are nearly 5 miles in length, 
and Loch Clunie and Loch Oich exceed 4 miles in length. Loch Quoich, 
again, covers an area of nearly 3 square miles, while Lochs Garry, 
Mhor, and Clunie exceed a square mile in area. Two of the lochs 
