LIST OF PLATES. 
PAGE. 
I. Hybodus Basanus ... ... ... .. ... 68 
II. Hybodus, Synechodus, and Cestracion ... ... ... 68 
jy" | Paheozoic Ctenostomatous Polyzoa... ... ... ,. 92 
V. Ground Plan of Flamborough ... ... ... ... 148 
VI. Fossil Polyzoa ... ... ... ... ... ... 160 
VII. Ground Plan of Duggleby Tumulus ... .. ... 224 
VIII. Vertical Section of do. ... . . ... ... 224 
IX.) 
X. >• Finds in Duggleby Tumulus ... ... ... ... 224 
XI.) 
XII ] 
XIU J Polyzoa from the Cornbrash of Thrapston ... ... ... 258 
^Xy'j" Calamostachys Binneyana (Schimp) ... ... .. 292 
XVI. Map of the York Moraines ... ... ... ... 310 
XVII. Portrait of Mr. James W. Davis, F.G.S., F.L.S., F.S.A. ... 319 
XVIII. Maps of the Seashore near Westward Ho ... ... ... 368 
XIX ) 
h Photographs of do. do. ... .. ... 368 
XXI. General Section of the Strata of Calderdale .. ... 373 
XXII. Chart of the Zones of the Chalk ... ... ... .. 395 
XXIII. Plan and Section of Chalk and Gravels, near Hessle ... 406 
XXIV. Chart of the Millstone Grit Beds .. ... ... ... 420 
XXV. Geological Map of the Yorkshire and Derbyshire Coalfield . . . 436 
XXVI. Sections across do. do. do. ... 436 
