Xll INTRODUCTION. 



E. Forbes, J. S. Gardner, J. G. Goodchild, J. W. Gregory, 

 T. T. Groom, A. C. L. G. Gunther, J. Haime, H. Hicks 

 G. J. Hinde, J. Hopkinson, W. H. Hudleston, T. H. Huxley, 

 H. Jelly, T. R. Jones, A. J. Jukes-Browne, W. Keeping, 

 J. W. Kirkby, W. Kowalevsky, P. Lake, E. R. Lankester, 

 C. Lapworth, J. Leckenby, W. Lonsdale, P. de Loriol, J. Lycett, 

 R. Lydekker, J. E. Marr, F. McCoy, L. C. Miall, J. Morris, 

 R. I. Murchison, E. T. Newton, R. Owen, J. Parkinson, A. 

 Pavlow, J. Phillips, J. Postlethwaite, T. Roberts, J. W. Salter, 

 R. Schafer, H. G. Seeley, A. C. Seward, G. W. Shrubsole, 

 W. J. SoUas, J. Sowerby, J. de C. Sowerby, R. H. Traquair, 

 A. Wanklyn, G. F. Whidborne, S. V. Wood, A. S. Woodward, 

 H. Woodward, S. P. Woodward, T. Wright, J. Young. 



In the preparation of the Vertebrate portion I have derived 

 very considerable help from the excellent ' Catalogue of British 

 Fossil Vertebrata' by Messrs. A. S. Woodward and C. D. 

 Sherborn. 



I have much pleasure in expressing my thanks to several 

 gentlemen for the assistance they have very generously given 

 me. I would especially mention Mr A. C. Seward who has 

 revised the Plants, Dr G. J. Hinde the Incertse sedis and 

 Porifera, Mr J. E. Marr the Hydi-ozoa and Trilobita, Professor 

 H. A. Nicholson the Actinozoa, Mr J. W. Gregory the Echi- 

 noidea, Asteroidea, and Blastoidea, Mr F. A. Bather the Cri- 

 noidea and Cystidea, Mr G. R. Vine the Polyzoa, Mr J. F. 

 Walker the Brachiopoda, Professor T. Rupert Jones the Ostra- 

 coda and Phyllocarida, Mr J. Carter the Decapoda, Mr A. H. 

 Foord the Cephalopoda, and Mr A. S. Woodward the Vertebrata. 

 I am also indebted to Mr T. Roberts and Mr J. W. Gregory for 

 much general assistance and advice. 



H. WOODS. 



November, 1891. 



