216 Prof, T. Rupert Jones — South Wales Entomostraca. 



lies at the bottom of tlie Pennant rocks, about 226 yards below the 

 Mynyddysllwyn Coal. 



Section of Sthata at Cilfach Bargoed Colliery. 



Shale. 



a. Blackband 1' 



6. Shale 



c. Blackband 1 



d. Shales (Fossil Shells and Leaia)... 2 

 ■^ e. Blackband 0' 



/. Shale 0' 



g. Blackband 0' 



h. Shale 0' 



.». Blackband (Fossil Shells) 



Shale 



and 

 Rock, 

 8'.0" 



— Coal, 2'. 8"-) 



— Shale, I'. >• Mynyddysllwyn. 



— Coal, 2'.6'0 



Shale. 



(Scale 20 feetto the inch,) 



§ 1. Anthracomya. — The MoUuscan shells referred to above are 

 very numerous, flattened and compressed, in layers. The chief 



