108 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
rock. The finer strie have been almost obliterated by the 
weathering of the rock, but the general direction is nearly due 
_ north and south, magnetic, pointing almost straight down the 
Gareloch. They indicate that, in the Ice Age, the glacier which 
came down the upper part of Loch Long, and was joined nearly 
opposite this point by that from Loch Goil, was unable to find 
sufficient accommodation in the lower part of Loch Long, and was 
forced to cross the col (which is only some 50-60 feet higher than 
where these markings were seen) and pass over to the Gareloch. 
The “spit” at Row, which forms the mouth of the loch, and from 
which the village and parish take their name (Rudha=ru, a point), 
is probably the terminal moraine—re-assorted by the tide—of the 
latest stage of this combined glacier. The Gareloch itself possesses 
too small a feeding-ground to have produced a large independent 
glacier. The valley, into which the party now descended, is the 
only one of any importance opening into the loch. The stream is, 
omitting the windings, very little over three miles in length 
from its source on Beinn-a-Mhanaich—pronounced “ Vannach ”— 
(2,328 ft.) to the head of the Gareloch. 
On the heathy moor on the side of the valley were found a 
few plants of the heart-leaved twayblade (Listera cordata), and 
of Habenaria albida, H. bifolia, and H. conopsea, as well as the 
following species of sedge :—Carex binervis, C. echinata, C. flava, 
C. fulva, C. glauca, C. pallescens, C. panicea, C. pulicaris, and 
C. pilulifera. As showing the early nature of the season, it may 
be noted that both species of heath (Lrica tetralia and £. cinerea) 
were found in flower. 
On reaching the burn the party proceeded up its bed as far as 
their time would allow. It has worn a channel down a con- 
siderable depth through the slaty rocks. In some places the 
sides are almost perpendicular, in others gently sloping, but very 
seldom is the gradient gentle. Here and there they are devoid 
of vegetation, where a landslip has brought down a mass of debris ; 
but in general they are covered with mosses, ferns, grass, bushes, 
trees, &c,, forming a succession of beautiful scenes. "When the 
stream is high, it must be difficult to get along the foot of the 
ravine, but, in consequence of the protracted drought, the water 
was very low, and it almost required the exercise of some 
ingenuity to get one’s feet wet, 
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