154 CARBONICOLA, ANTHRACOMYA, AND NAIADITES. 



Chance Pennystone 



Fungous Coal 



Blackstone Coal and Ironstone 



Ballstone 



Top Coal 



Half-yard Coal 



Double Coal 



Yellow Hat Ironstone 



Yard Coal 



Blue flats Ironstone 



White Hats Ironstone 



Flint Coal 



Pennystone Ironstone 



Stinking or Sulphur Coal 



Chinch Coal 



Besl Coal 



Handle and Clod Coal 



Little Flint Coa 



( Irawstom 



1. Coal-field of Coalbkookdale. 



With Productus scahriculus, Conularia, and Megaliohthys 



Said to contain Unios. 



Plant and fish remains. 



With a few Unios. 



A few Unios and fishes. 



With Carhonicola aquilina, C. ovalis, C. acuta, C. turgida, and plant 

 remains. 



With Carhonicola aquilina, C. ovalis, C. turgida, C. acuta, Naiadites 

 modiolaris, N. quadrata, and Crustaceans ( Bellinurus and Prestwichia). 



With Unio-like bivalves. 



With marine shells and Carhonicola robust a, C. ovalis, C. acuta, and others 

 (Prestwich), and Anthracomga dolabrata. 



^Many plant remains. 



With plant remains. 



With Naiadites carina! a, N. triangularis, and Anthracomya modiolaris. 



Nog e. — In Professor Prestwich'a monograph the name Unio is given to Carhonicola, Anthracomya, and Sanguino- 

 lites, so that it is uncertain, where Unio-like shells arc said to occur in a bed without specific name, as to which of these 

 genera thej uclong. In the list, however, at pp. 491, 492 of his work marine shells are stated to occur only in the 

 Pennystone and Chance Pennystone beds. 



