Pliotographed V)y A. 1{. Dwerryhouse, Leeds. 
Fig. 1. X 12. 
CHERT, ELSLACK FREE SCHOOL, CRAVEN. 
Photograiihed by A. R. DwenyhoiLse, Leeds. 
Fig. 2. X 20. 
BLUE-BLACK MASSIVE LIMESTONE, UPPER BEDS, HAWSHAW SLACK 
DELF, LOTHERSDALE. 
Proc. Yorbs. Geol. Soc, Vol. XVI., Plate XLIV. 
