THE FRESH-WATER LOCHS OF SCOTLAND. 
335 
Firth 
Monar 
LBuna.charnn . — 
L.Ca/avie 
'J^n bead Loch 
'’Lanjrachda.jdffi 
fLAshie 
■SeUchm 
LMuHardoch 
Llungard 
L.Bemn a’ 
Mheadhotn. 
L.Affric 
le Bonne 
L.Cluunh 
Fort Augustus ^ 
Beauly is formed by the junction of the river Farrar with the river 
Glass. The river Glass is formed by the junction of the Amhuinn 
Deabhaidh (bearing the outflow from Loch na Beinne BMne) with the 
river Affric, while the river Cannich is a tributary of the river Glass. 
The river-systems within the Beauly basin, and the relative positions 
of the different lochs, are shown on the accompanying index-map 
(Fig. 50). The area of the entire basin, as measured with the plani- 
meter on the 1-inch Ordnance Survey maps, is about 343 square miles, 
of which about 215 square miles (or 63 per cent.) drain into these 
thirteen lochs, as will be seen from the summary table on p. 350. 
An inspection of the summary table shows, further, that all the 
lochs exceed half a mile in length, while eight of them exceed a 
mile in length; the two largest lochs (Mullardoch and Monar) exceed 
4 miles in length, and have each an area exceeding a square mile. 
Seven of the lochs exceed 100 feet in depth, and two of them exceed 
200 feet, the deepest one being Loch Monar, with a maximum depth 
of 260 feet; this loch is also the one containing the largest volume 
of water. The boundary-line between the counties of Inverness and 
Ross runs up the centre of Loch Monar for the greater part of its 
length, and it crosses Loch Mullardoch in its central portion, so that 
FIG. 50. INDEX MAP OF THE BEAULY BASIN. 
