of Edinburgh, Session 1878-79. 
125 
smoothed surfaces. The rocks on the south wall are rough and 
jagged. The appearances on the north walls can be naturally ac- 
counted for by the action of a strong sea current moving from 
W.H.W., which would, with any bodies floating in or swept along 
by it, grate against the north, but not against the south wall. (See 
fig. 11 .) 
6. Ben More is a hill on the farm of Eoligarry tenanted by Dr 
MacGillivray. Its west end forms a steepish sea cliff, rising up to a 
height of 330 feet above the sea. Half way up this sea cliff, there 
is a boulder, 20 x 10x5 feet, resting on the rocky surface, which 
here dips towards the W.S.W. But the rock, judging by the marks 
on it, has been smoothed by something passing over it from the 
N.W., and the boulder is blocked at its S.E. end by a vertical 
portion of the hill, as shown on fig. 12. 
7. At Castle Bay, which is at the south end of Barra, the hills 
are seen to be more covered with boulders on their N.W. sides than 
on any other. This observation, however, was made only from the 
steamboat. 
Mr J. E. Campbell, in his paper on the “ Glacial Phenomena of the 
Hebrides,” states that, in Sept. 1871, he took rubbings of striae 
at Castle Bay, showing that the striating agent had come from N, 
by W. (magn.) 
He mentions also that on the small island of Bernera, above 12 
miles to the south of Barra, “ the last of the Hebrides,” he got 
striae at a height of 720 feet above the sea, crossing the strike of the 
rock, from N.N.W. ( Lond . Geol. Soc. Journal , vol. xxix.) 
In coasting along the east shore of Barra it is perceivable, from 
the deck of the steamboat, that the rocks on the sea cliffs which 
face the JST.W. have been smoothed, whilst the rocks facing the 
east are rough and jagged. 
8. On the hill called Scurrival, whose west side rises abruptly up 
from the sea to a height of about 240 feet, the hard gneiss rocks 
present many proofs of grinding, and also of transporting agency 
from the H.W. 
The rock-strata here are tolerably horizontal and form blocks 
lying about north and south. The vertical sides facing the sea 
present frequent smoothings, which could have been made by 
the action of a strong H.W. current, especially if loaded with 
