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GEOLOGY OF THE BEISTOL COAL-FIELD. 



The ''roofs " over the seams are the localities which furnish so 

 many and beautiful varieties of the fern fronds. Some are very 

 productive, as for instance the roof of the " Hard seam." 



The following list of fossils, although imperfect, yet contains all 

 that have been well ascertained to have been collected from the 

 Coal seams of the Bristol District. 



Alethopteris Serlii (Brong.) 

 lonchitica (Sternb.)* 

 Mantelli (Brong.) 



Caulopteris Phillipsii (Lind.) 

 primceva do. 



Sphenopteris irregularis (Brong.) ^ 



Aspidiaria confluens (Presl.) 

 Lepidophloios laricinum (Sternb.) 

 Ulodendron minus (Brong,) 

 majus (L. & H.) 

 Conybeari (Smith) 

 punctatum (L. & H.) 



» Found in Lower Measures. 



