THE FRESH- WATER LOCHS OF SCOTLAND. 
201 
the usual irregular form, consisting of a number of narrow branches, 
separated by conspicuous promontories, and contains several small islands. 
It is shallow, with a few deeper holes, with depths of 25 feet in the south 
portion, and 27 feet (the maximum) in the north portion. It is fully half 
a mile in length. On June 3, 1904, there was a difference of 8°-4 between 
the temperature at the surface and that at 25 feet, a fall of no less than 
6°*4 being observed between 15 and 20 feet : — 
Surface ... 
15 feet . . . 
20 „ ... 
25 „ ... 
60°-4 Fahr. 
59'^H „ 
53°-0 „ 
52°-0 „ 
Loch Sunder (see Plate LXXVII.). — Loch Hunder lies on the west 
flank of the South Lee, as Loch Obisary lies at the foot of Eaval. It is 1 J 
miles long by two-thirds of a mile in greatest breadth, and nearly a quarter 
of a mile in mean breadth. The outline, though much indented, is simpler 
than usual in the lochs of Uist. It is more like a valley loch, but the 
presence of many islands indicates that it is not a simple basin. These 
islands divide the loch into three distinct basins. The northern basin is 
cut off from the middle basin by two large islands, the larger of which is 
joined by an artificial causeway to the east shore. It has a maximum 
depth of 38 feet. In the passage between the island and the west shore 
the minimum depth is 7 feet. The middle basin contains the maximum 
depth of the whole loch, (30 feet. It is separated from the southern basin 
by a chain of three islands. The middle one, called Dun Ban, is in the 
centre of the loch, and has fairly deep water both to the east and west. 
The eastern island is connected with the shore by a causeway, and close to 
it, on a smaller island, is a large Dim. Between the middle island and the 
western one is a depth of 34 feet. The southern basin has a depth of 55 
feet, a short distance south of Dim Ban. The volume of water in Loch 
Hunder is 146 millions of cubic feet. The superficial area is about 185 
acres, or fully a quarter of a square mile. The drainage area of 2^ square 
miles includes Loch a’ Chonnachair, which is a quarter of a mile distant, the 
stream from it passing through a little loch occupying about half that 
distance. The burn flowing from Loch Hunder to Loch Eport is only 40 
or 50 yards in length. When surveyed on June 2, 1904, the loch was 
22‘55 feet above sea-level. There was a range of temperature of 7° from 
surface to bottom, distributed as shown in the table appended ; — 
Surface . 
10 feet . 
20 „ . 
25 „ . 
59°-0 Fahr. 
58°-6 „ 
57°-3 „ 
53°-6 „ 
52°-0 „ 
