of Edinburgh, Session 188 0 - 8 1 . 279 
Challium, the sides of which are so marked, down to a level of 
about 950 feet. 
No boulders were found on these hills or in the valleys. 
From these glaciated hills a view across the Linnhe Loch was 
obtained; and in particular, looking along the groovings of the 
rocks on the sides of Coire Maell Challium , the eye catches a sight 
of the trench of the River Durer, and hits upon “ the very spot in 
the small col in the spur of Fraochaidh , where, at almost the same 
altitude, glacial strice were observed in 1879.” — (See p. 42 of last 
year’s Report.) 
3. Another set of hills visited on the north side of the Linnhe Loch 
are those embracing Glen Conar. Having followed up the glen for 
3 miles without finding boulders or marks of glaciation, Professor 
Heddle states that he struck off by hills marked on the ordnance 
map, Sgur an Lubhair , Stab Coire Riacli and Slob Choire a Cliear- 
chaill. On the last-mentioned hill, he found so remarkable a trainee 
of boulders that it at first occurred to him they might possibly have 
been derived from a natural dyke or vein which had disintegrated. 
He searched carefully for such, but could see no traces of any. The 
boulders — for such he now considered them to be — lay on and along 
a ridge of the hill for nearly a mile, at heights varying from 2400 
to 1800 feet, below which last level none were found. The direc- 
tions of the trainee was N.N.W. and S.S.E. The boulders were 
generally not larger in size than a cubic yard, and consisted mostly 
of a peculiar syenite with some of the felspar crystals of a red 
colour, and with hornblende of a lively green colour. He counted 
nineteen boulders of that kind. There were also other boulders 
interspersed, of ordinary syenite, gneiss, and trap. 
As it appeared, to him that the ice which brought these boulders 
had crossed the Linnhe Loch, Professor Heddle next visited several 
hills on the opposite or south side of the Loch, in hopes of discover- 
ing boulders of the same peculiar syenite. One of the many hills 
visited was Bein Blian, reaching to a height of 1500 feet. The 
rocks in this hill are of clay slate, and at its summit, on the east 
side, there is quartzite with embedded crystals of hornblende. 
Another hill, not far off, is Beinn na Gucaig, reaching to a height 
of 2017 feet, composed of quartzite overlying clay slate. 
On both of these hills, boulders of the peculiar syenite seen on 
2 x ' 
VOL. XI. 
