THE FRESH-WATER LOCHS OF SCOTLAND. '215 



Morsyail (see Plate LXXXVII.) is a small broad loch near the 

 head of Little Loch Roag. The neighbouring hills are somewhat distant, 

 the immediate surroundings low, except southward, where Scalaval Mula 

 rises to 850 feet. The outline is roughly rhomboid, the length a little 

 more than half a mile from south to north, the greatest breadth one-third 

 of a mile. The basin is simple, of moderate depth, a narrow strip of over 

 25 feet in depth lying west of the centre, with a maximum depth of 

 31 feet. The mean depth is 12 feet, the area about 65 acres, and the 

 volume of water 35 millions of cubic feet. The drainage area is extensive, 

 extending to 10 square miles. The principal stream entering the loch is 

 the Amhuinn a' Loin, conveying the drainage of the south side of Beinn 

 Mheadhonach. The Amhuinn a' Chlachain Mhoire flows out northwards. 

 The height of the surface above sea-level could not be measured, but is 

 estimated at about 70 feet. 



The temperature at the surface on August 3, 1903, was 60-1 Fahr., at 

 15 feet 59-l, and at 29 feet 58-9. 



Loch Stacsavat (see Plate LXXXVI.) is a small triangular loch 

 intervening between Loch Suainaval and the sea at Uig. The hills on the 

 west rise only about luu feet above the loch ; on the east they are higher, 

 and rise steeply from the shore to 450 feet. It is three-quarters of a mile 

 long by one-third of a mile in greatest breadth. It is a simple basin, with 

 the 25-feet contour roughly parallel to the shore, and the maximum depth 

 of 40 feet about the centre. The mean depth is 17J feet, the area about 

 87 acres, and the volume 66 millions of cubic feet. The area drained, 

 including Loch Suainaval, is nearly 11 square miles. On the south the 

 river Eyscleit enters from Loch Suainaval ; the river Forsa, a quarter of a 

 mile long, passes northward by a series of small waterfalls into Lon Erista, 

 the head of Camus Uig. The surface on the date of the survey, July 25, 

 1903, was 35-9 feet above sea-level. 



The temperature varied more than 5 Fahr. from surface to bottom, 

 thus: 



Surface 61 c -8 Fahr. 



10 feet 61-4 



20 59--0 



30 57'0 



37 S6--4 



Considering the water-supply derived from Loch Suainaval, it is 

 remarkable that the whole series should be so much higher than that taken 

 in Loch Suainaval on the previous day. 



Loch Suainnc'tl (see Plate LXXXVI.), called locally Suainavat, is a 

 large and somewhat broad loch, situated a mile or two south-east of Uig. 

 It occupies a narrow steep-sided valley, the hills bounding which are 

 highest on the west , while a comparatively low ridge separates it on the 



