543 



On the Fossil Mora of the Forest of Dean Coalfield (Gloucester- 

 shire), and the Relationships of the Coalfields of the West of 

 England and South Wales. 



By E. A. Newell Arber, MA., F.L.S., F.G.S., Trinity College, Cambridge, 

 University Demonstrator in Paleobotany. 



(Communicated by Prof. T. McKenny Hughes, F.E.S. Eeceived November 18, 

 1911,— Head February 1, 1912.) 



(Abstract.) 



Very little has been previously recorded of the flora of the Forest of Dean 

 coalfield, and in the present paper the results of a thorough examination of 

 the flora, and of the vertical distribution of the plants in the three divisions 

 of the productive measures of this coalfield, are discussed. In all 44 species 

 are described, none of which, however, are new to Britain, though some are 

 rare plants elsewhere. The list of species, which have been collected chiefly 

 by the aid of grants from the Pioyal Society Government Grant Committee, 

 is as follows : — 

 Equisetales — 



Galamites varians Sternb. ; C. ramosus Artis. ; C. suekowi Brongn. ; 



C. tmdidatus ?- Sternb. 

 Calamocladus equisetiformis (Schloth.). 



Annidaria radiata ? (Brongn.) : A. stellata (Schloth.); A. galioides (L. and 



H.) ; A. sphenophylloides (Zenker). 

 Calamostachys tuberculata (Sternb.). 

 Maerostachya infundibuliformis (Brongn.). 



Sphenophyllales — 



SphenophyVv.m emaryinatum Brongn. ; S. menus (Bronn). 



PTERIDOSPERME.E AND FlLICALES — 



Sphenopteris neuropteroidcs (Boulay) ; 8. (Renaultia) chcerophylloides 

 (Brongn.). 



Mariopteris mv/ricata (Schloth.); M. latifolia 1 (Brongn.). 



Newropteris scheuehzeri Hoffni. ; X. macrophylla Brongn. ; N. ovata 



Hoffm. ; X. rarincrvis Bunb. ; X. (Cydopteris) fimhriata Lesq. 

 Ahthopteris aqvAlina (Schloth.) ; A. grandini (Brongn.) : A. davreuxi 



(Brongn.). 



Pecopterris miltoni (Artis.) ; P. polymorpha Brongn. ; P. arborescens ? 

 (Schloth.) ; P. (Dactylotheca) plumosa (Artis.). 



