PROCEEDINGS 
nV TIIK 
YORKSHIRE 
Geological and Polytechnic 
Society. 
NEW SERIES, VOL. XI. 
1888-1890. 
WITH TWEXTY-OXE PLATES. 
EDITED MY 
JAMES W. DAVIS, Honorary Secretary, 
F.G.S., F.S.A., F.L.S., &c., 
Honorary Member of the (Geological Association, Leeds ; and of th© 
Xaturalists' Societies of Leeds, York, Dewsbury, and Malton. 
HALIFAX : 
Whitkr & Booth, rriiiters, &c. Crown Street, 
1 S 0 I . 
