DISTRIBUTION. 



157 



4. Coal-field of South Wales. 



Mynyddsllwyn Coal 

 Blackband 



Cockshute or White Rocks 

 Upper Pius 

 Shale with Soap Vein 

 Black Pins 

 Shale and Ironstone 

 Ell Coal 

 Soft Clod 

 Shale, |-Coal 

 Mine over Bydyllog Coal 

 Darrenpins 

 Mine over Engine Coal 

 Yard Coal 

 Fire-clay or Ironstone 

 Old Coal 

 Spotted Vein 

 Red Vein 

 Blue Vein Shale 

 Bottom Vein 

 Farewell Rock 

 Rosser Vein beds, Millstone Grit 





With Antltracoinya (Phillipsii ?). 



With Anthracomya Adamsii and plant remains; and with Carbonicola 

 aquilina, C. acuta, and ? C. turgida in the Pennypieces which are sup- 

 posed to be at about the horizon of the Soap Vein at Ynys-cedwin. 



With Carbonicola acuta and plant remains. 



.-Plant remains. 



Carbonicola turgida. 



. With Anthracomya pumila and A. subcentrali 



With Athyris plauosulcata. 



With Anthracomya senex, A. modiolaris, Waiadites modiolaris, N. quad- 

 rata, N. carinata, Carbonicola aquilina, and C. ovalis. 



With Spirifer bisulcatus and Productus scab ricu las. 



With Carbonicola acuta and C. turgida. 



With Spirorbis carbonarius. 



With Carbonicola acuta, C. turgida, and other shells 



With Carbonicola acuta, C. turgida, Naiadites carinata, and Spirorbis 

 carbonarius. 



With many fish remains. 



With a rich marine molluscan fauna. 



