SUPPLEMENT (No. I) 



TO THE 



MONOGRAPH 



ON 



THE FOSSIL REPTILIA 



OF THE 



WEALDEN AND PURBECK FORMATIONS. 



Order— DINOSAURIA, Owen. 

 Genus — Iguanodon, Mantell. 



In the 'Monograph on the Iguanodon,' in a former volume of the publications of the 

 Palaeontographical Society,* the characteristic form of certain toe-phalanges was 

 described ; such phalanges, at least, were inferred to belong to the Iguanodon, with a 

 high degree of probability, on evidence of association with other undoubted parts of 

 the skeleton of that reptile, and more especially in the instance of the Maidstone 

 skeleton ;t but at that period the exact structure and number of toes of either fore or 

 hind foot were unknown. 



On the basis, however, of the determination of detached phalangeal bones in that 

 Monograph, the present restoration of an entire — probably hind — foot, the carpus or 

 tarsus excepted, of the Iguanodon, has been carried out ; the ungual phalanges in the 

 series of bones of this foot (T. I, II, III) closely corresponding in shape with the 

 depressed and obtuse phalanges referred to that extinct animal in the above-cited 

 volume, 1855, pp. 42 — 44. This most interesting and instructive framework of the foot 

 of the great Dinosaurian herbivorous reptile was, moreover, found in a formation and at 

 a locality where unequivocal vertebrae and other parts of the Iguanodon are common ; 



* 'Fossil Reptilia of the Wealden Formations,' Part ii, p. 40, t, xvi and xvii, (vol. for 1854.) 

 t 'Fossil Reptilia of the Cretaceous Formations,' Part i, p. 105, t. xxxiii, (vol. for 1851.) 



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