328 
Proceedings of the Royal Society of Edinburgh.; [Sess. 
The collection of bones was submitted to Mr E. T. Newton, F.R.S., for deter- 
mination, and a brief preliminary report on the deposits and the fauna 
was communicated to the Geological Section of the British Association 
in 1892* 
Before describing the sequence of deposits in this bone-cave, a brief 
account will be given of the physical and geological features of the 
district, the glaciation, and the underground drainage. For these pheno- 
mena have an important bearing on the initiation of the cave, and on 
the interpretation of the evidence furnished by the earlier deposits. 
I. Physical and Geological Features of the District. 
The accompanying map (fig. 1) shows the prominent topographical 
features of the region. In the central tract a marked depression runs 
from Allt Sgiathaig (Skiag Burn), which flows into Loch Assynt from 
the north, southwards b}^ Inchnadamff, and along the valley of the 
Loanan to Ledmore. It is bounded on the east by an undulating plateau 
which is prominently developed between the Traligill river and Allt nan 
Uamh. Beyond this plateau there is a conspicuous range of high ground, 
extending from Glas Bheinn (2541 feet) in a south-easterly direction to 
Conamheall and Ben More (3273 feet). It is continued southwards in 
the Breabag range, whose highest points rise above the level of 2000 feet. 
Allt nan Uamh drains the western slope of Breabag, and joins the river 
Loanan about a mile and a quarter south from Inchnadamff. 
On the west side of the central depression there is a group of isolated 
hills, Spidean Coinich (2508 feet), Beinn Gharbh (1769 feet), and Canisp 
(2779 feet), with lofty escarpments facing the west and gentle slopes 
towards the east. These physical features bear a close relation to the 
geological structure of the region. 
Detailed descriptions of the complicated tectonics of the district sur- 
rounding Inchnadamff have been given in the memoir on “ The Geological 
Structure of the North-West Highlands of Scotland.” j- For our present 
purpose it will be sufficient to indicate the distribution of the rock 
formations in relation to the glaciation and the underground drainage. 
The depression running along the Skiag Burn and the valley of the 
Loanan to Loch Awe coincides in a general way with the boundary 
between the belt of country lying to the east that has been affected by 
the great series of post-Cambrian movements and the undisturbed area 
to the west. 
* Brit. Assoc. Rep. for 1892, p. 720. See also Trans. Inv. Sci. Soc., vol. iv, p. 118. 
f Mem. Geol. Surv. (1907), pp. 508-525. See also Geol. Surv. 1-incli sheets 107 and 101. 
