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February, 1878. 



(From the Canadian Naturalist, Vol. VIII. No. y.) 



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Scottis'h Devonian Plants. 



By J. W. Dawson, LL.D., F.R.S., Principal and Vici-Chancellor 

 of McGill University, Montreal. 



(Read before the EdinburKh Geological Society, 20th Deo. 1877, 

 D. Milne Home. Esq., LL.D.. President, in the chair.) 



« 



Since the publication of my Memoirs on Devonian Plants, in 

 the Journal of the Geological Society of London and in the 

 Reports of the Canadian Geological Survey, I have watched 

 with some interest the progress of discovery in the Devonian 

 Flora of Scotland, and desire now to make a few remarks on 

 new and critical forms, and on opinions which have been expressed 

 by workers in this field. 



Previously to the appearance of my descriptions of Devonian 

 plants from North America, Hug'i Miller had described forms 

 from the Devonian of Scotland, similar to those for which I 

 proposed the generic name Psilophyton ; and I referred to these 

 in this connection in my earliest description of that genus.* 

 He had also recognized what seemed to be plants allied to 

 Lycopods and Conifers. Mr. Peach and Mr. Duncan had made 

 additional discoveries of this kind, and Sir J. Hook«r and Mr. 

 Salter had described some of these remains. More recently 

 Messrs. Peach, Carruthers and McNab have worked in this iSeld, 

 and in the present year f Messrs. Jack and Etheridge have 

 summed up the facts and haye added some that are new. 



The first point to which I shall refer, and which will lead to 

 the other matters to be discussed, is the relation of the charac- 

 teristic Lepidodendron of the Devonian of Eastern America, 

 L. Gaspianum, to L. nothum of Unger and of Salter. At 

 the time when I described this species I had not access to 

 Scottish specimens of Lepidodendron from the Devonian, but 



* Journal Geological Society, London, 18S9. 



•flbid, 1877. - 





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