THE FRESH-WATER LOCHS OP SCOTLAND. 193 



the temperature of the water was found to be uniform, readings *at the 

 surface and at 15 feet being identical, 61'0 Fahr. 



Loch Leodsay (see Plate LXXV.). A small tidal loch lying just south 

 of Loch Oban a' Chlachain. It is nearly two-thirds of a mile long by 

 a quarter of a mile broad, of very irregular form, with a large western 

 and smaller eastern expansions. The west portion is very shallow, and the 

 greatest depth, 17 to 20 feet, is in the narrow channel between the two 

 expansions. 



The Creige Leithe Basin. This basin includes only two lochs, the 

 lower one, Loch na Creige Leithe, very small; the upper, Loch nan 

 Garbh Chlachan, much larger. The basin opens into Loch nan Gealag, 

 a branch from the strait between Uist and Grimsay. 



Loch nan Garbh Chlachan (see Plate LXXV.). A small rhomboid 

 loch, from which a number of narrow inlets branch off. It is barely half 

 a mile long by a quarter of a mile broad. The shores are of rock, and 

 it is filled with larger and smaller rocky islands and boulders. It is all 

 shallow, except in the open water east of the principal islands, where there 

 is a depth of 25 feet. The surface on June 9, 1904, was 15'2 feet above 

 the sea. The temperature was 61'0 Fahr. at the surface and at 25 feet. 



Loch na Creige Leithe (see Plate LXXV.). A narrow loch, only a 

 quarter of a mile long, with rocky shores. It is at the same level as 

 Loch nan Garbh Chlachan, being only separated by a bar of stones. The 

 maximum depth is 14 feet. 



Loch an Tomain (see Plate LXXVI.). A typical Uist loch, with its 

 complexity of form, being almost cut into a number of lochs by narrows 

 and islands. It is nearly 1J miles in length and one- third of a mile in 

 extreme breadth. The western of the four chief basins has a maximum 

 depth of 36 feet, the middle basin 37 feet, the eastern basin 31 feet, and 

 the north-eastern basin 44 feet, the maximum depth of the loch. . The 

 loch on June 23, 1904, was 14' 15 feet above the sea. It drains by a 

 small stream one-third of a mile long into the Little Minch. The shores 

 are steep and rocky on all sides. 



The Crogavat Basin. There are only two lochs in this basin the 

 lower, Loch Crogavat, connected by a short stream with the Little Minch ; 

 the upper, Loch a' Ghlinne-Dorcha, the second deepest loch on the island. 



Loch a' Ghlinne-Dorcha (see Plate LXXVI.). A dark little loch, 

 occupying the whole of the east flank of Burrival (461 feet high). It is 

 half a mile long by one-third of a mile broad, covering an area of 50 acres, 

 and is divided into two portions by a constriction. The northern part is 

 occupied by a large island. In this part the deepest sounding is close 



