218 DINOSATJKIA. 



Iguanodom mantelli, Meyer \ 



The type species. Proportions slender; length from 5,000 to 

 6,000 (nearly 20 feet). Cranium 0,500 in length, narrow and 

 elongated ; nares forming long narrow slits, half the length of the 

 mandible ; orbit with horizontal diameter longer than vertical ; 

 supratemporal fossa narrow. Five vertebrae in sacrum. Scapula 

 long and narrow, its length (0,620 to 0,720) equal eight times its 

 width ; coracoid small, short, and broad, with complete foramen ; 

 humerus short (0,430 to 0,470) ; metacarpals elongated and later- 

 ally compressed. Ilium with preacetabular process equal nearly one 

 half its entire length (0,710 to 0,750) ; postacetabular portion 

 short ; pubis with preacetabular process short, thin, and much ex- 

 panded (width at extremity 0,200) ; femur with inner trochanter 

 in middle of shaft (length 0,710 to 0,810) ; tibia relatively long 

 (length 0,670 to 0,750). 



Hob. Europe (England and Belgium). 



Unless stated to the contrary ', the following specimens are from 

 the Wealden. 



40100. Numerous associated fragments of jaws and teeth ; from 

 the Lower Greensand of Black-Gang Chine, Isle of Wight. 

 These specimens are referred to the present species on 

 account of their apparent association with the scapula 

 No. 40102. Purchased, 1859. 



R. 754. A nearly entire left maxilla with teeth, probably belonging 

 (Fig.) to this species ; from Cuckfield, Sussex. Figured by 

 Hulke in the ' Quart. Journ. Geol. Soc' vol. xlii. pi. xiv. 

 Presented by H. Willett, Esq., 1886. 



2211. An imperfect left maxilla, showing dental alveoli, probably 

 (Fig.) belonging to this species; from Cuckfield. Figured by 

 Mantell in the ' Phil. Trans.' 1848, pi. ix. 



Mantell Collection. Purchased, 1838. 



R. 102-3. Portions of the right and left dentary bones of a man- 

 diblo, probably belonging to this species ; from the Isle of. 

 Wight. Fooc Collection. Purchased, 1882. 



28663. Fragment of a mandibular ramus, agreeing in size with the 

 preceding ; from the Isle of Wight. 



Mantell Collection. Purchased, 1853. 



1 Palaeologica, p. 110 (1832). 



