218 BATHYMETKICAL SURVEY OF 



lies are much higher on the north side. On the flat southward towards 

 Loch Bodavat are numerous small lochans. The length from west to east is 

 a mile, the greatest breadth, at the west end, nearly half a mile. The main 

 part of the loch is a simple basin, with the maximum depth, 50 feet, near 

 the west shore. A narrow shallow arm, 13 feet deep at the mouth (greatest 

 depth within 8 feet), runs one-third of a mile eastward and receives the 

 burn from Loch Cro Criosdaig. The mean depth is nearly 1 7 feet, the area 

 about 128 acres, and the volume 93 millions of cubic feet. It drains 

 an area of 6 square miles, including Lochs Cro Criosdaig and Benisval, from 

 which its water is chiefly derived. It discharges by Amhuinn Thainana- 

 bhaidh westward into the sea-loch of the same name. The surface was 1 99-4 

 feet above sea-level on August 4, 1903. The temperature varied nearly 

 4 Fahr. from surface to bottom : 



Surface 59-0 Fahr. 



25 feet 59-0 



35 58-6 



40 58-0 



45 57-2 



49 55-2 



Loch Cro Criosdaig (see Plate LXXXIX.) is a small loch on the stream 

 connecting Loch Benisval with Loch na Craobhaig, to the north of Loch 

 Resort. To the south the hills rise 100 feet above the surface, towards 

 Loch Benisval, northward they rise more gradually to Beinn Mheadhonach, 

 1303 feet. In form it is irregular, measuring four-fifths of a mile from 

 west to east, with a maximum breadth of one- third of a mile. It is a 

 shallow basin, nearly two-thirds of the area being covered by less than 10 

 feet of water, and deeper towards the east, where there are two little holes 

 20 and 21 feet in depth. The mean depth is 9 feet, the area about 80 

 acres, and the volume 31 millions of cubic feet. It drains an area of 3 

 square miles, including Loch Benisval, and overflows by the Amhuinn 

 Uidh Phail, 300 yards long, westward to Loch na Craobhaig. The 

 surface was 229*8 feet above sea-level on August 1, 1903. 



Loch Benisval (see Plate LXXXIX.) is a broad sheet of water about 

 half a mile north of Loch Resort, near the head of that loch. Low hills 

 surround the loch, rising from 50 to 300 feet above the surface, the highest 

 being Benisval, to the south-east, 624 feet in height, or 350 feet above the 

 loch. The main loclTis of oblong form, with a narrow prolongation to the 

 south-east. It is three-quarters of a mile long, measured in a straight line 

 from north to south, and half a mile broad. It is a simple and relatively 

 deep basin, with sides most steeply sloping along the base of Benisval, and 

 the maximum depth, 95 feet, near the east shore. The northern end, where 

 are many small islands, is shallow. Only two lochs, Langavat and 

 Suainaval, are deeper, and Loch Raonasgail is of the same depth. The mean 

 depth of nearly 35 feet is exceeded only by Loch Suainaval and equalled 



