100 RASTALL : THE INGLETONIAN SERIES OF W. YORKSHIRE. 
Archaean massif probably underlies the Pennine area of the 
north of England at no great depth. 
Finally my thanks are due to Professor Hughes for his 
kindness in allowing me to compare my manuscript map with 
his, and for other help ; to Dr. Bonney and Dr. Marr for kind 
assistance and useful criticism ; and to Dr. Dwerryhouse for 
several days' help and companionship in the field. 
Bibliography. 
The following list comprises the most important references 
to the rocks of the Ingletonian series in easily accessible memoirs 
and periodicals. It makes no pretence of completeness and 
could easily have been greatly enlarged. In particular, many 
papers which deal exclusively or nearly so with the Silurian 
rocks of the district have been omitted : — 
Bonney. — Report of the British Association, 1886. Presi- 
dential address, Section C. 
Dakyns, Tiddeman, Gunn and Strahan. — Geology of 
Ingleborough, Memoir of Geological Survey, 1890, p. 3. 
GooDCHiLD. — Geological Magazine, 1892, p. 299. 
Hughes. — Geological Magazine, 1867, p. 346. 
Hughes. — Proceedings of the Yorkshire Geological Society, 
XIV., 1902, p. 323. 
Marr. — Geological Magazine, 1892, p. 104. 
Nicholson. — Geological Magazine, 1869, p. 213. 
Phillips. — Transactions of the Geological Society, III., 
1829, p. 1. 
Playfair. — Illustrations of the Huttonian Theory, 1802. 
Sedgwick. — Quarterly Journal of the Geological Society, 
VIII., 1852, p. 39. 
Tate. — Proceedings of the Yorkshire Geological Society, 
1891. 
I 
