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Discussion. 



The President remarked that the Society could not but be 

 pleased to find modern methods of detailed palaeontological and strati- 

 graphical work successfully applied to a district which for so long 

 a time had remained somewhat vaguely understood. The diligent 

 search for fossils by the Author and his local friends had happily 

 thrown new light on the Culm-Measures of Devon and Cornwall, 

 which seemed now at last to be capable of being satisfactorily 

 correlated with the other developments of the Carboniferous system 

 in this country. 



Mr. Ussher congratulated the Author on his successful treatment 

 of the rocks of Central Devon and North Cornwall. The results 

 obtained fully justified the opinion unhesitatingly expressed by 

 ♦Sedgwick & Murchison in the year 1837, that the Culm plants of 

 Devon, as then known, proved the correspondence of the rocks with 

 the true Coal-Measures. They referred to Prof. Phillips's view 

 as to the equivalence of the greater part of the Culm trough to the 

 Middle and Upper Divisions of our true Carboniferous Series. 

 Townshend Hall, who was a pupil of Phillips, always spoke of 

 the Culm shales and grits as ' Millstone Grit.' In definitely 

 assigning a Middle Coal-Measure facies to the flora of the Culm 

 grits and shales, the Author had settled this question as to the equi- 

 valence of the rocks above the Lower Culm-Measures. The speaker 

 was glad that the vexed question as to the equivalence of the Lower 



