THE FRESH-WATER LOCHS OF SCOTLAT^D. 
209 
rounding moor is low, with slight hills on the west and south-west. It is 
a maze of ramifying channels, promontories, and islands, similar to Loch 
Scadavay in North Uist, but much less extensive. After Loch Langavat it is 
the longest loch in the island, measuring nearly 3 miles, with a maximum 
breadth of half a mile. On the whole it is very shallow, having the low 
mean depth of 9 feet. There are many little depressions, separated by 
shallows, and many large and small islands and boulders further increase 
the irregularity of the contours. The two westernmost expansions of the 
loch have depths of 26 and 28 feet respectively. The maximum depth of 
35 feet is close to the west shore, north-w*est from Eilean nan Uan. The 
superficial area, about 388 acres, is exceeded by only two lochs, Langavat 
and Suainaval ; the volume, 156 millions of cubic feet, is equal to that of 
Loch Fadagoa, and is exceeded by four lochs, Langavat, Suainaval, Grunavat, 
and Benisval. The drainage area, which includes Loch Fadagoa and the 
two smaller lochs Airidh, amounts to 16 J square miles. The river Lag na 
Linne, which enters at the northern extremity of the loch, conveys the over- 
flow of many lochs on the southern slope of the hills Beinn nan Surrag 
and Eitshal. A considerable, though very short, stream also enters from 
Loch Fadagoa, at the western extremity. The communication with Loch 
Faoileag is by a channel nearly 100 yards wide and only 1 foot deep. 
Loch Faoileag, from which the river Laxey issues, though here treated as 
a separate loch, might be regarded as a part of Loch Trealaval. On the 
date when surveyed (August 8, 1903) the surface was 88‘5 feet above sea- 
level. The temperature at the surface was 57°*3 Fahr., and at 25 
feet 57”*4. 
Loch Fadagoa (see Plate LXXX.) is a fairly large narrow loch 
between Lochs Trealaval and Langavat. The surroundings are low moor- 
land, except on the south, where there is a hill of moderate elevation. 
The outline is extremely irregular, with many constrictions and expansions, 
and there are many small islands. The length, from north to south, is a 
little over 2 miles ; the breadth, measured into the narrow prolongation 
which runs eastward towards Loch Trealaval, is nearly a mile. In corre- 
spondence with the irregular outline the bottom is very uneven, and there 
are five separate depressions over 20 feet in depth. The largest of 
these is in the southern triangular portion of the loch, and includes the 
maximum depth of 46 feet. A small hollow in the centre of the loch has 
a depth of 39 feet, and the northernmost depression a depth of 36 feet. 
The eastern extension is shallow, the greatest depth being 8 feet. The 
mean depth is over 1 1 feet, the area nearly half a square mile, and the 
volume 156 millions of cubic feet, exactly the same as that of Loch 
Trealaval. The drainage area exceeds 3 square miles. It includes many 
small lochs, the most important being a chain of three, leading westward 
to Loch nan Eilean. The outflow is by a stream only about 200 yards 
long, with a fall of 6 feet to Loch Trealaval. On the date of the survey 
p 
