275 



SECTION III. 



THE 



FOSSIL EEPTILIA OF THE WEALDEN FORMATIONS. 



Chapter I.— Order DINOSAUBIA* 



(Cervical and anterior dorsal vertebra; with parapophyses and diapophyses ; 

 dorsal vertebrae with a neural platform ; sacral vertebrae exceeding two in number ; 

 body supported on four well-developed unguiculate limbs.) 



<re««s— Iguanodon. 



Dentes incrassati, marginihus lammellosis. 



In the preceding Section is recorded tlie history of the discovery, in the Green 

 Sand formation, of that important collection of the bones of one and the same 

 individual Reptile, from which we have been able to deduce, without any doubtful 

 element of conjectural approximation or analogy, the characters of the dorsal and 

 caudal vertebrae, of the teeth, of the scapular arch, iliac bones, and most of the bones 

 of the extremities of the gigantic extinct species, for which Conybeare suggested the 

 generic name of Iguanodon, and which Ciivier, with other systematic Palaeontologists 

 have denominated, after its original discoverer, Iguanodon MantcUi. 



The satisfactory evidence which so rare a collection of parts of the same skeleton 

 affords, induced me to commence my illustrations of this remarkable herbivorous 

 Dinosaurian with Mr. Bensted's famous specimen : and I now proceed to describe 

 the characters of the rest of the skeleton, so far as undoubted parts of it have been 

 obtained from the Wealden Strata, in which the first evidences of the Iguanodon 

 were discovered by Dr. Mantell, and from which the most abundant and varied remains 

 of this remarkable herbivorous reptile have since been obtained. 



* Keport on Britisli Fossil Reptiles, 1841, in 'Trans. Brit. Association,' 8vo, 1842, p. 102. Pictet, 

 'Traits Elenientaire de Palicontologie,' 8vo, torn, ii, 1845, p. 52. From the Greek hcivos, fearfully great; 

 aavpos, a lizard. 



