INTRODUCTION. XXXV 
Professor Dr. L. de Koninck, Li¢ge; Count. Alexandre von Keyserling, St. Peters- 
burg; Mr. John Morris, F.G.S., &c.; Sir Roderick Impey Murchison, G.C.S. &c. ; 
Professor James Nicol, Queen’s College, Cork ; Professor Richard Owen, F.R.S., &c. ; 
Professor John Phillips, F.R.S., &c.; Mr. John Pickering, London; Mr. Joseph 
Prestwich, jun., F.G.S.; Mr. John Rogerson, Newcastle-on-Tyne; Mr. J. de C. 
Sowerby, F.L.S., &c.; Mr. J. W. Salter, A.L.S., &c.; Rev. Professor Sedgwick, M.A., 
&c.; Mr. H.C. Sorby, F.G.S., Woodbourn, near Sheffield; Professor Dr. John Scouler, 
Dublin Royal Society; Mr. G. Tate, F.G.8., Alnwick; M. Ed. de Verneuil, Paris; 
Mr. Robert Vint, Sunderland; and Mr. Edward Wood, Richmond, Yorkshire. 
I must also express my deep obligations to Sir Philip de Malpas Grey Egerton. 
Bart., M.P., F.R.S., &c., for his highly valuable contributions on Permian Ichthyology, 
Had this portion of the present Monograph depended on my own resources and 
competency, it certainly would have been greatly deficient in one of its most important 
features: considering this, I feel myself particularly called on, to express how much I 
feel the compliment of having been assisted by one who so ably represents the great 
Agassiz among British Paleontologists. While on this subject, I feel it my duty to 
express my thanks to the Council of the Yorkshire Philosophical Society, and the 
Curator of the Museum, Mr. E. Charlesworth, F.G.S.; also to Dr. Edward Charlton, 
and the Committee of the Natural History Society of Northumberland, Durham, and 
Newcastle-on-Tyne, for the loan of several invaluable specimens of fossil fish, most of 
which are herein figured; and to Mrs. Surtees, of Mainsforth, for the loan of all the 
specimens belonging to the valuable collection of her late gifted husband, the author 
of the ‘ History and Antiquities of the County Palatine of Durham.’ 
My obligations are also deservedly due to Mr. T. Rupert Jones, Assistant Secretary, 
&c., of the Geological Society of London, for his excellent notes on the Permian Morami- 
nifera and Entomostraca, which, had it not been for his labours, would only have been 
briefly noticed in the present work. 
To the President, Sir Henry de la Beche, F.R.S., &c., and the Council of the 
Palzeontographical Society, and especially to the courteous and indefatigable Honorary 
Secretary, Mr. J. S. Bowerbank, F.R.S., &c., I am under the deepest obligation,—not 
only for the many favours they have kindly obliged me with,—but because I feel 
persuaded the labour they have expended in connexion with this Monograph, has too 
seriously encroached on time that might have been more profitably occupied on those 
studies in which they respectively have earned the highest reputation. 
WILLIAM KING. 
Prosprct Hitt, Gatway, 
July, 1850. 
