490 Bihliograjphical Notices. 



With regard to the Chalk itself, the groundwork of the country, 

 more definite and trustworthy views as to its origin, extent, and 

 subdivisions have been added to the shrewd but somewhat vague 

 notions of earlier geologists, by a host of English and continental 

 naturalists, within the last twenty years ; and the Chalk fossils, 

 80 well depicted in the fine plates of Dixon's and Mantell's works 

 on Sussex, have been more definitely determined, in very many 

 instances, by later palaeontologists at home and abroad. 



By invoking the aid of his colleagues, collaborateurs, and friends, 

 geological and palaeontological, in the reproduction of notes and 

 memoirs, published in various periodicals, elucidative of some of the 

 matters within the range of Dixon's great work, in the revision and 

 correction of determinations of the manifold fossil forms treated of, 

 and, lastly, in the contribution of descriptions of newly observed 

 organic remains, the Editor of the present volume has rearranged 

 and, indeed, reconstructed this now comprehensive " Geology of 

 Sussex." To enumerate those who have so willingly and ener- 

 getically cooperated with Prof. Eupert Jones in thus restoring, as it 

 were, a noble literary and scientific monument to the late Erederick 

 Dixon, one of the best geologists of Sussex, would be to mention a 

 very large proportion of both the veteran and the rising geologists 

 of the day. Antiquaries, too, of such high standing as C. Roach 

 Smith and John Evans, with others, have given assistance in 

 revising notes on those interesting antiquities of Sussex which 

 Dixon described, con amove, in his work ; and one of the younger 

 archaeologists (Mr. E. H. Willett) has given valuable contributions 

 on like matters. 



The 1st, 2nd, 3rd, 6th, and 8th chapters of the book, treating of 

 the Post-tertiary, Tertiary, Cretaceous, and Wealden formations, are 

 new — either written bj- the Editor, or composed of important papers, 

 reprinted or contributed for the occasion, on the geology of Sussex 

 localities. Chapters 4, 5, and 7 have been revised throughout 

 and much augmented with similar matter. 



In Part 11. the description of the fossils has been carefully 

 revised throughout. The Plant>-remains of Sussex, both Tertiarj^ 

 and Cretaceous, have been described most satisfactorily, in compre- 

 hensive memoirs, by Mr. CaiTuthers. The Ventriculites have been 

 clearly demonstrated by Mr. W. J. Sollas. The Foraminifera have 

 been treated anew by Mr. H. B. Brady and the Editor ; and the 

 latter adds a list of those of the English Chalk and Chalk-marl. 

 The Crustacea have been revised and added to by Dr. H. Woodward, 

 with the concurrence of Prof. Bell, E.R.S. Sir P. Grey-Egerton 

 and Mr. E. T. Newton have fully revised the fossil Fishes ; and the 

 latter has supplied a perfect list of those of the EngHsh Chalk. 

 The descriptions and notes on the numerous and interesting fossil 

 Eeptiles, having received Prof. Owen's best attention, are, again, 

 brought up to the requirements of the day. 



Some points of special interest to the people of Sussex, and dwelt 

 on more or less particularly in this volume, are : — 1, the physical 



