278 Scientific Intelligence. 
author, that many of the stratified crystalline rocks of the Highlands 
would prove to be the metamorphosed equivalents of the fossiliferous 
Lower Silurian rocks of the south of Scotland. : 
Sir Roderick adverted to a feature in the older series of crystalline 
rocks of the west coast of Scotland, which ‘still required to be more 
accurately defined than had hitherto been done. Prof. Sedgwick and 
himself had formerly called attention to the occurrence, near Ullapool, of 
Inverness, Nairn, Moray, &c. During his excursion of this year, Prof. 
Nicol and himself saw, near Inchnadampff, in Assynt, a similar inter- 
position of hard red conglomeritic grit, resting at once unconformably 
in the older gneiss; but bad weather prevented their ascertaining 
of rocks of this age, regularly interpolated between the Silurian and 
Carboniferous systems, there occurred a mixture of the same species 
Ho- 
h of 
h 
Scotland, with the shells which characterize the formation in the slates 
bet and calcareous type which it assumes in Devonshire. He then @a- 
