IGUANODONTIDiE. 201 



lateral ridges also serrated. Ilium (fig. 46) with postacetabular 

 portion tapering to a point ; ischium very long and slender, with 

 short head, small notch between latter and obturator process, and 

 shaft twisted, with small distal expansion ; pubis shorter thau 

 ischium. 



Iguanodon bernissartensis, Boulcnger 1 . 



Syn. Iguanodon seelyi, Hulke 2 . 



(?) Streptospondylus major, Owen 3 . 



Larger and stouter than type species ; typically total length from 

 8,000 to 10,000 (33 feet) 4 . Cranium (fig. 40) 0,650 in length, 

 relatively broad ; nares shorter and wider than in I. mantelli, their 



Fig-. 40. 



Iguanodon bernissartensis. — The skeleton ; from the Wealden of Belgium. 

 About T V- The scale indicates metres. 



(Reduced from the figure published by M. L. Dollo, Bull. Mus. Boy. 

 Hist. Nat. Belg. 1883, t. ii. pi. v.) 



length being one third that of the mandible ; orbit with vertical 

 diameter longer than transverse; supratemporal fossa broad and 

 angulated. Anterior dorsal vertebrae with very tall arches, in which 



1 Bull. Ac. R. Bclg. ser. 3, vol. i. p. (50(5 (1881). 



2 Quart. Journ. Geol. Soc. vol. xxxviii. p. 135 (1882). 



3 Eep. Brit. Assoc, for 1841, p. 91 (1842). 



4 Some of the following dimensions arc exceeded by specimens in the 

 Museum. 



