334 BATHYMETRICAL SURVEY OF 



LOCHS OF THE BEAULY BASIN. 



THE Beauly basin is an important and extensive one, extending across 

 almost the entire width of Scotland, from Beauly firth on the east 

 coast to within about 4 miles from the shores of Loch Duich, and 

 about 6 miles from the shores of Loch Carron, on the west coast. The 

 basin is situated in a very mountainous district, many of the peaks in 

 the central and western part of the basin exceeding 3000 feet, and 

 some of them approaching 4000 feet, in height, while on proceeding 

 eastward towards the outlet of the basin the land becomes gradually 

 less elevated. On the southern boundary of the basin are Tigh Mor 

 (3222 feet), Sgurr nan Conbhairean (3634 feet), Garbh Leac (3673 feet), 

 Sgurr nan Ceathramhan (3614 feet), Ciste Dhubh (3218 feet), Cam 

 Fuaraloch (3241 feet), and Sgurr a' Bhealaich Dheirg (3378 feet) ; on 

 the western boundary Beinn Fhada (Ben Attow, 3383 feet), Sgiirr nan 

 Ceathreamhnan (3771 feet), Lurg Mhor (3234 feet), and Sgiirr Choin- 

 nich (3260 feet), on the northern boundary Sgiirr a' Chaoruinn (3452 

 feet), Bidean an Eoin Deirg (3430 feet), Maoile Lunndaidh (3294 feet), 

 Sgiirr Fhuar-Thuill (3439 feet), Sgorr a' Choir-Ghlais (3552 feet), and 

 Sgurr Ruadh (3254 feet) ; while in the central part of the basin are 

 Craig Dhubh (3102 feet), Sgiirr na Lapaich (3773 feet), An Riabhachan 

 (3696 feet), Beinn Fhionnlaidh (3294 feet), Mam Sodhail (Mam Soul, 

 3862 feet), Cam Eige (3877 feet), Tom a' Choinich (3646 feet), a 

 second peak named Sgurr na Lapaich (3401 feet), and Tuill Creagach 

 (3452 feet). Besides these heights there are many others which do 

 not attain the 3000-feet level. In the valleys between these chains of 

 mountains lie the lochs which were sounded by the Lake Survey staff. 

 In the most northerly valley, Glen Strath Farrar, there is the con- 

 nected series consisting of Lochs Calavie, an Tachdaidh, an Gead, 

 Monar, a' Mhuilinn, and Bunacharan ; in the central valley, Glen 

 Cannich, the connected series of Lochs Lungard, Mullardoch, and 

 Sealbhag ; and in the most southerly valley, Glen Affric, the connected 

 series of Lochs Affric, an Laghair, and Beinn a' Mheadhoin ; with the 

 isolated Loch na Beinne Baine as an outlier situated towards the head 

 of Strath Glass. These valleys all trend in a more or less east-and- 

 west direction, converging towards the north-east, where the river 



