xvi INTRODUCTION. 



Sussex, usually referred to as 'Tilgate Forest.' Dr. GideoiT 

 A. Mantell, F.R.S., the discoverer of Iguanodon and Hylceo- 

 saurus, Mr. G. B. Holmes, of Horsham, and Mr. S. H. 

 Beckles, F.R.S., of St. Leonard's, obtained most of the 

 Reptilian fossils described in the early memoirs of Mantell,. 

 Melville, and Owen, while Major Lambert Brickenden 

 also added a few noteworthy specimens. The Mantellian 

 Collection was purchased by the British Museum in 1838 

 and 1853; that of the late Mr. Holmes has recently been 

 acquired by the Brighton Museum; and that of Mr. Beckles 

 is still at the residence of its founder at St. Leonard's. The 

 Rev. William Fox, of Brixton, collected numerous remains 

 of Dinosaurs from the Wealden cliffs on the south coast of 

 the Isle of Wight, discovering the fine examples of Ornith- 

 opsis, PolacantJnts, Hypsilophodon, and other genera now 

 in the British Museum ; while Mr. J. W. Hulke, F.R.S., 

 has obtained an important series of bones from the same 

 locality, including the type skeleton of Iguanodon seelyi 

 and other specimens described in his own memoirs. During 

 recent years, Mr. Charles Dawson, F.G.S., has greatly 

 extended the collection of the British Museum, by adding 

 numerous discoveries from Sussex localities, including the 

 type specimens of three new species of Iguanodon. 



Except in the Potton Bone-bed, which chiefly consists 

 of rcmanic fossils from the Kimeridge Clay, Vertebrata 

 of Lower Greensand age are rare in Britain, the only 

 unique specimens being the type skeleton of Iguanodon 

 mantelli and the group of Dinosaurian bones from Hythe 

 (Dinodocus mackesoni), discovered by Mr. H. B. Mackeson, 

 F.G.S., and presented by him to the British Museum. The 

 Upper Cretaceous formations, however, have proved more 

 prolific, the Cambridge Greensand consisting largely of 

 reptilian bones and teeth, and the Gault and various divi- 

 sions of the Chalk furnishing numerous specimens both of 

 Reptiles and Fishes. The Cambridge Greensand is natur- 

 ally best represented in the Wcodwardian Museum, Cam- 



