218 
BATHYMETEICAL 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 Thamana- 
bhaidh westward into the sea-loch of the same name. The surface was 1 99*1: 
‘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 
Eesort. 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 Eesort, 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 loch is 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 Eaonasgail is of the same depth. The mean 
depth of nearly 35 feet is exceeded only by Loch Suainaval and equalled 
