THE FRESH-WATER LOCHS OF SCOTLAND. 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 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-west 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, whe.re 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 3l> 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 11 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 



