viii 
CONTENTS. 
*' On the Source of the Erratic Boulders in the Valley of the River Cal- 
der, in Yorkshire." By James W. Davis, F.S. A., F.G.S., &c. Ul 
" The Trias of the Southern Part of the Vale of York." By H. Franklin 
Parsons, M.D., F.G.S., fee. 154 
il Some Account of the Fossil Plants found at the Darfield Quarries, near 
Barnsley." By Stephen Seal, F. G. S 162 
^ On the Divisions of the Glacial Beds in Filey Bay." By G. W. Lamp- 
lugh 167 
" On the Source of the River Aire." By Thos. Tate, F.G.S 1 77 
" Notes on an Intermittent Spring at Malham." By T. Tate, F.G,S. 186 
" Notes on the Midland Coal Field." By Arnold Lupton, Mec. Inst., 
C.E.. F.G.S. 187 
"On Ostracanthus dilalatus (Gen it'sp. nor), a Fossil Fish from the Coal- 
measures South of Halifax, Yorkshire." By James VV, Davis, 
F.G.S 191 
" Plumpton Rocks." (Photograph ) By the Editor 196 
Annual Report ... ... ... ... ... ... ... ... 198 
Minutes and Balance Sheet ... .. ... ... ... ... 201 
Summary of Geological Literature, 1877, 1878 ... 212 
List of Members ... ... ... ... ... ... ... ... 214 
1S80. 
Address. By the Marquis of Ripon, K G., &c. President 221 
* On the Distribution of Fossil Fishes in the Yorkshire Coal Fields." 
By James W. Davis, F.S. A., F.G.S., &c. 228 
u On a Fault in the Chalk of Flambro' Head, with some Notes on the 
Drift of the Locality." By G. W. Lamplugh 242 
k< On Glacial Deposits North of Bridlington." By J. R. Dakyns, M.A., 
H.M. Geological Survey ... ... ... ... ... ... 246 
** On the Age of the Penine Chain." By E. Wilson, F.G.S. {References) 252 
" On a Short History of the Creswell Caves." By the Rev. J. Magens 
Mello, M.A., F.G.S., &c , 252 
" On a Group of Erratic Boulders, at Norber, near Clapham in York- 
shire." By James W. Davis ... ... ... ... ... 206 
" On the Junction of the Permian and Coal Measures, at Conisborough." 
By Rowland Gascoigne, F.G.S. (References.) ... ... ... 274 
■• On a Chemical Method of Distinguishing Black Obsidian from Black 
Blast Furnace Slag." By W. H. Wood, F.C.S. 274 
" On Traces of Ancestral Relations in the Structure of the Asteroidea." 
By W. Percy Sladen, F.L.S., F.G.S. 275 
" On the Geology of the District around Middlesborough." By W. Y. 
Veitch. (Abstract.) 284 
" Notes on the Geology of the Cleveland District." By Thos. Allison 285 
" On Some Bones of Ctenodus." By Prof. L. C. Miall 289 
