Proceedings of' the Wernerian Sociefy. 39S 



by the Wernerian Society many years ago; — that he, in 1811, 

 in a memoir read before the Society, maintained that nearly the 

 whole, if not the whole, of the sandstone, both red and white, of 

 the island of Arran, belonged to the old coal formation, and 

 that, upon this sandstone, on the opposite coast of the mainland, 

 as near to Saltcoats, the more common or newer beds of the 

 coal formation were seen resting. He also noticed, that, in 

 1805, in his pubhshed Mineralogical Account of the county of 

 Dumfries, he had described the occurrence of red sandstone in 

 Dumfriesshire, as connected with the coal formation ; and, in 

 the same work, that, in Mid-Lothian, red sandstone was met 

 with in the coal formation, as at Roslin, &c. ; and that this 

 red sandstone occurred, generally in the lowest part of the coal 

 formation, abundantly in East Lothian, Fifeshire, Berwickshire, 

 Roxburghshire, &c. The old red sandstone, a formation con- 

 nected with quartz-rock, and older than the red sandstone of the 

 coal formation, Professor Jameson remarked, was well displayed 

 on the banks of Loch Ness, in the county of Sutherland, and 

 in many other places in Sotland. 



4. Syenite or Granitel of Skye, Craig of Ailsa, St Kilda, 

 Arran, 4'C. — Professor Jameson requested the attention of geo- 

 logists who may visit Arran, to the syenite and granite rocks, 

 apparently in connexion with sandstone and conglomerate, in 

 the line extending from the upper part of Gl&ncloy to the great 

 body of granite of the northern division of the island. He also 

 recommended geologists to examine particularly the two chief 

 granites of the island, viz. the small granular, and occasionally 

 syenitic varieties on the west side, and the coarse granular on 

 the eastern side of the island, and to bear in remembrance that 

 these western and eastern granites might prove to belong to 

 different formations. The Professor also mentioned a variety of 

 particulars illustrative of the geological positions and mode of 

 formation of the granular crystalline rocks of the Craig of Ailsa, 

 St Kilda, and the island of Skye, from which it appeared to re- 

 sult, that these rocks, viewing them as of igneous origin, were 

 of newer formation than the great coal formation. 



5. Organic Remains in the Coal Formation. — The labours 

 of Messrs Nicol and Witham, it was remarked, had added con- 

 siderably to our knowledge of the plants of this formation ; and 

 the specimens and details furnished for publication by the Pre- 



