40 FOSSIL PLANTS FROM THE KENT COALFIELD. [Feb. 1909, 



were nearly horizontal, in consequence of being at the centre 

 of the trough, those at the other places were in proximity to the 

 north-eastern margin, wbere the dip was considerable, as shown by 

 the specimens on the table, say about 15° to 20°. The speaker 

 remarked, however, that, so far as he was aware, no very certain 

 means had been invented for determining the direction of the dip 

 by means of cores brought up from bore-holes ; in the case of 

 Waldershare, there were reasons for inferring that the dip must be 

 in a south-westerly direction. 



Mr. J. A. Thomson asked the Author at what heights above sea- 

 level the various bore-holes were started. 



The Rev. If. H. Wixwood alluded to the fine assemblage of fossils 

 collected by Mr. McMurtrie from the Eadstock Coalfield, the 

 measures in which were commonly divided into Upper and Lower 

 Coal-Measures by a vast mass of Pennant Sandstone, and asked the 

 Author to which horizon he would refer them. The fossils had 

 been examined some years ago by Dr. Kidston. 



The Author, in reply to Prof. Hull, said that the Pas-de-Calais 

 Coalfield appeared to offer the closest analogy to that in Kent, for 

 only the highest beds there represented, forming the zone of the 

 Charbons Gras (which was the equivalent of the British Transition 

 Series), were of economic importance ; whereas, in the Pennine 

 System, a lower horizon, the Middle Coal-Measures, was the most 

 important coal-bearing zone. 



In reply to questions as to the amount of the dip, and the depth 

 of the Coal-Measures at Waldershare, the Author stated that, as he 

 had not had the oversight of the actual borings, he could add 

 nothing to what Prof. Eoyd Dawkins had already stated on those 

 points. With regard to the question as to the horizon of the Eadstock 

 and Farrington Series of the Somerset Coalfield, Dr. Kidston had 

 shown, more than twenty years ago, that both these series belonged 

 to the Upper Coal-Measures. 



