HISTORY OF THE SOCIETY. 477 



apparently in connexion with sandstone and conglomerate, in 

 the line extending from the upper part of Glencloy 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. 



4. 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 by the President of the 

 Society, also by Dr Fleming, Dr Hibbert, Lord Greenock, and 

 others, were daily extending our acquaintance with the fossil 

 corals, shells, and fishes of this interesting formation. In re- 

 gard to the fossil fishes and coprolites in the limestone, slate, 

 and ironstone, of the middle region of Scotland, it was re- 

 marked, that, in several districts on both sides of the Forth, 

 they were met with in considerable abundance, where they were 

 first pointed out by the President of the Society, and afterwards, 

 in some new localities, by Walter Calverley Trevelyan, Esq., 

 Lord Greenock, Dr Hibbert, and Thomas Jameson Torrie, 

 Esq, Professor Jameson mentioned some beds in the coal- 

 formation so thickly studded with coprolites, that they might 

 be named coprolite beds ; while others abounded so much with 

 fish scales, that they might not unaptly be termed scale beds ; 

 and further, that the coprolites were not confined to the Fern 

 limestones, but were met with also, although hitherto not so abun- 



