

[June, 1904. 



THE PALiEONTOLOGfY OF THE LANCASHIRE 

 COAL MEASURES. 



Mr. H. Bolton, F.R.S.E., 

 The Museum, Bristol. 



PART 11. 

 X.'O The Middle Coal Measures. 



The attempt to work out the palaeontology of the Middle 

 Coal Measures of Lancashire has proved a task of considerable 

 difficulty for a variety of reasons, not the least of which has 

 been my removal to a distance from the coalfield. One fact 

 which has become increasingly impressed upon me is, that, 

 the material facts I have obtained, although large, are yet 

 inadequate to justify any wide systematic correlation of the 

 various seams. 



These facts will prove, nevertheless, of the greatest possible 

 value to mine managers and others, as guides in their search 

 for various seams. 



The present paper I regard as marking a real starting 

 point in the working out of the palaeontology of the Middle 

 Measures, rather than its end, and further work can only be 

 prosecuted successfully by a cordial co-operation between the 

 mine manager and the palaeontologist. Co-operation can be 

 effected by diligent collecting of fossils, and the accurate 

 determination of their position with reference to a particular 

 seam, or stratum on the one hand, and on the other of a 

 careful identification of the specimens so collected. 



The best work will be done, if, at any particular colliery 

 where fossil collecting is taken in hand, the collector makes 

 a systematic examination of the strata from above downwards 



