INTRODUCTION. xxxvii 



Professor Dr. L. de Koninck, Liege ; 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.S. , 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 Palaeontologists. 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 Lcndon, for his excellent notes on the Permian Forami- 

 nifera and Bntomostraca, 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 

 Palseontographical 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. 



Prospect Hill, Galway, 

 July, 1850. 



