Photographed l.y A. It. 1)« en vhoiisc. 
Fig. 1. X 20. 
HARD DARK LIMESTONE, EARB\ -THORNTON ROAD, TUNCII BOWL HILL. 
Photograplied l.y A. R. Dwerr.vho.ise, Leeds. 
Fig. 2. X 20. 
HARD BLUE LIMESTONE, GILL ROCK, CRAVEN. 
Proc. Tories. Geo/. Soc, To/. XVI., Plate XLL 
