ON THE CLASSIFICATION OF TSE CARBON [FEROTJS SERIES. 613 



33. Oil the Upper Limit of tJie essentially Marine Beds of the 

 Carboniferous Group of the British Isles and adjoining 

 Continental Districts ; with Suggestions for a fresh Classi- 

 fication of the Carboniferous Series. By Professor Edward 

 Hull, M.A., F.R.S., F.G.S., Director of the Geological Survey 

 of Ireland. (Read April 2b, 1877.) 



Contents. 



Part I. 



A. Introductory. Progress of correlating the Carboniferous Beds of Ireland 

 with those of Great Britain. B. Table of the British Carboniferous Series. 



Part II. 



Irish Carboniferous Districts. A. Southern Coal-districts. 1. Castlecomer 

 and Killenaule Coal-fields ; 2. Limerick, Clare, &c. B. Northern Coal- 

 districts. 1. Leitrim Coal-fields ; 2. Tyrone Coal-field ; 3. Bally castle 

 Coal-field. 



Part III. 



English Carboniferous Districts. 1. South Lancashire; 2. Yorkshire and 

 Derbyshire; 3. North Staffordshire; 4. Flintshire and Denbighshire; 5. 

 Coalbrook Dale ; 6. South Staffordshire ; 7. Leicestershire ; 8. Warwick- 

 shire ; 9. Somersetshire ; 10. South Wales Coal-basin. 



Part IV. 



Scottish Carboniferous Districts. General Section of the Carboniferous 

 Series ; Representatives of the Gannister and Yoredale Beds (Stages E and 

 C) ; Representative Stages in the North of England and Central Scotland. 



Part Y. 



Continental Equivalents. A. Stage E or " Gannister Beds," with Marine 

 Shells. 1. Belgium; 2. North of France ; 3. Silesia; 4. Westphalia. B. 

 Equivalents of Stages A, B, C, and D. Table of British and Continental 

 Divisions. [Note. American Representatives.] 



Part VI. 



(a) General Conclusions regarding the Characters of the Fauna, (b) Cen- 

 sus of Marine Forms; (c) Occasional Marine Beds in Stage F ; (d) Present 

 mode of Classification objectionable ; (e) Proposed new Classification ; 

 (/) Summary of Conclusions. Table of Representative Divisions and 

 Stages. Table of Marine Organisms, with their vertical range. 



Part I. 



Introductory . — It is only recently that the materials have been 

 obtained for a complete comparison between the different members 

 of the Carboniferous group as they occur in Ireland and Great Bri- 

 tain. Much misconception has, for example, prevailed in some 

 quarters regarding the true position in the series of those beds which, 

 in the south of Ireland, immediately overlie the Carboniferous 

 Limestone ; and by some means or other, which I have not fully 



Q. J. G. S. No. 132. 2 s 



