706 ME. J. E. MAEE AKD DE. H. A. KTCHOLSON 



AustwicJc Beck, near Settle. 



The section here is described by Prof. Hughes in the ' Geological 

 Magazine,' vol. iv., and one of us has given additional notes in the 

 * Geological Magazine/ dec. iii. vol. iv. The Bala Beds are succeeded 

 here by a conglomerate of variable thickness^ passing up into a lime- 

 stone which contains Trilobites found in different zones in the Stock- 

 dale Shales ; this limestone is immediately followed by the Lower 

 Coniston Flags. Either the Skelgill Beds are absent, and the repre- 

 sentatives of the Browgill Beds rest unconformably on the Bala 

 Beds, or the conglomerate and succeeding limestone represent the 

 whole Stockdale-Shale series. "We shall revert to this question in 

 the sequel. 



Bibhle Valley, 



At Crag Hill, near Horton, Prof. Hughes describes a breccia-like 

 limestone overlying the Coniston Limestone, in which he records the 

 occurrence of Favosites. One of us has examined this. 



There certainly is a strong resemblance between this limestone- 

 conglomerate and the conglomerate of the valley, and the former like 

 the latter occurs between the ordinary Coniston Limestone and 

 the Lower Coniston Flags. We agree with Prof. Hughes therefore 

 in referring the Crag-Hill calcareous conglomerate to the Stockdale- 

 Shale series. 



Teesdale. 



"We complete our description of the Stockdale Shales of the north 

 of England by referring to the probable existence of Browgill Beds at 

 Cronkley Mill, as described by Messrs. Gunn and Clough. 



The accompanying figure (fig. 13) gives a general section through 

 the Stockdale Shales, showing the foU development of the zones. 

 The thickness of the whole series varies from two hundred and fifty 

 feet to over four hundred feet, the latter thickness being that of the 

 beds in the Sedbergh district. 



"We append a table (pp. 726-729) showing the distribution of the 

 fossils in the different zones of the Stockdale Shales. 



§ Y. COMPAEISON WITH C0EEESP01O)ING BeDS US' OTHEE AeEAS. 



One noticeable feature about the Stockdale Shales is the inter- 

 calation of non-Graptohtic beds containing more highly organized 

 fossils with the Graptolite-bearing shales. "We are thus enabled to 

 compare the series with the corresponding Graptolitic beds of other 

 areas as well as with, non- Graptolitic ones. 



"We will commence with a comparison of our beds with the 

 corresponding Graptolitic shales of the other areas, and we naturally 

 start with those of the South of Scotland, which have been so 

 admirably and clearly worked out by Professor Lapworth. 



It is hardly necessary to insist on the similarity between the 

 Skelgill Beds and the Birkhill Shales, and between the Browgill Beds 



