THE 



QUARTERLY JOURNAL 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



Vol. LXIII. 



1. On the Upper Carboniferous Rocks of West Devon and North 

 Cornwall. By E. A. Newell Arber, M.A., F.L.S., F.G.S., 

 Trinity College, Cambridge, University Demonstrator in Paleo- 

 botany. (Read November 7th, 1906.) 



Contents. 



Page 



I. Introduction 1 



II. The Lithological and Physical Characters of the Rocks 4 



III. The Carbonaceous Rocks 8 



IV. The Calcareous Rocks 10 



(a) The Impure Limestone-Bands. 



(b) The Calcareous Nodules and their Fauna. 



V. The Fossil Flora and the Horizon of the Beds 17 



(a) The Plant-Impressions. 



(b) The Plant-Petrifactions. 



VI. The Marine and Freshwater Faunas 23 



VII. General Conclusions 24 



VIII. Bibliography 26 



I. Introduction. 



For some years past my attention has been directed to a study of 

 the Upper Carboniferous rocks of Devon and Cornwall. The main 

 object of enquiry has been to ascertain as much as possible of the 

 fossil plant-remains, more especially with a view to determining 

 the horizons to which they belong. 



Some of the results attained have been already published. 1 In 



1 Arber (04) (05 1 ) (05 2 ), aud Rogers & Arber (04). These numerals in 

 parentheses refer to the year of publication of the paper, to which full refer- 

 ence will be found in the Bibliography, § VIII of this paper, p. 26. 



Q.J.G.S. No. 249. b 



