](5(3 Dr. Mac Culloch's Supplement, to the 



at some defiance. It is possible to reconcile them only by supposing 

 that the red sandstone series belongs to the primary rocks, and the 

 whole of these strata which extend from the point of Sleat to the 

 limestone of Strath, will thus form a succession of rocks alternating 

 with and graduating into each other. That the gneiss is a primary 

 rock can, I imagine, admit of no dispute. 



In formerly describing the limestone district, I expressed my 

 expectation that the strata of Kilbride and those at the entrance of 

 Loch Eishort would be found identical with those at Broadford, 

 and that expectation has been realized by a complete examination 

 of the district in question. 



On the Broadford shore the commencement of the limestone 

 beds is found near a small farm called Lucy, but their actual contact 

 with the sandstone cannot be seen, on account of a sandy beach 

 which covers the junction. It is probable that some conglomerate 

 exists in this interval, as detached masses of such a rock are found 

 in different places in the hilly grounds between Strath and Loch 

 Eishort ; but I need not dwell on a circumstance so common every 

 where that it can scarcely fail to be present here. As the inclinations 

 of the sandstone and limestone are in the same direction near this 

 junction, the latter however dipping only five degrees to the north- 

 west while the former dips ten, there can be no doubt but that they 

 are connected in the usual regular order of succession. 



From this, which I shall call the lowest line of the limestone, it 

 can be traced under various interruptions along a high ridge of 

 hills to Loch Eishort, where it coincides with the beds formerly 

 described as found there. Independently of this connection, the 

 identity of the whole is proved by the correspondence of the or- 

 ganic remains, which at Broadford however are more abundant 

 than on the opposite side. The principal difference at the two ex- 

 tremities consists in the numerous beds of shale and sandstone that 



