14 CARBONIFEROUS LAMELLIBRANCHIATA. 



The Caeboniferous Sequence in Ireland. 



irTpper. 

 Middle. 

 Lower. 



Flagstone series. 



Shale series, with Aviculopecten papyraceiis and Posidonomya 

 Becheri} 



'Upper limestone "I Dark earthy limestone, with grey shales and 

 Middle limestone/ chert. 

 Lower limestone. Pale grey crystalline. 

 /"Sandstone. 



Coal Measures 



Cahboniferoxjs Limestone 



Series. 



Shale. Dark shales and thin limestones, and 

 Lower Carboniferous^ . ^, ,^ ,y r^ ^ -e ^ ^ j 



in the south the Carboniferous slate and 



I Coomhola grits. 



The Carboniferous Sequence in Somersetshire. 



^ ,r _ rKadstock and Farringdon series. 



Coal Measures Upper \^^ ^ , , ,^ , 



iJNew Rock and Vobster series. 



Millstone G-rit Sandstones. 1000 feet. 



r^ T rUpper Carboniferous shales, sandy in character. 



Carboniferous Limestone ^ j 



- Mountain limestone. 



Series. 1 



Lower Carboniferous shales.^ 



The Carboniferous Sequence in Devonshire. 



fj Grey grits, slates, and shales. Eggesford type. 

 /-J J Op^^pa J ISandstones, grits, shales, and beds of culm. Morchard type. 



I Cherts, shales, and grits. Coddon Hill type. 

 ^Shales with thin grits, dark limestones, and beds of culm. 

 Passing down without any lithological break into Upper Devonian. 



The Carboniferous Sequence of Belgium. 



Coal Measures. 

 Transition beds in Namur. 



j'Visean. Detrital. 

 Carboniferous Limestone- Waulsortian. Corallian. 



iTournaisian. Crinoidal. 



1 On account of the fauna contained in these beds the writer has included them in the Coal- 

 measure group. 



2 The Lower limestone shales contain many fossils which are also found in the Marwood, Coom- 

 hola, and Moyola beds, often classed as Upper Devonian. 



