238 DINOSAUKIA. 



36510. A terminal phalangeal, apparently of the fourth digit of the 



left pes ; from Cuckfield. 



Mantell Collection. Purchased, 1853. 

 R. 133. An imperfect terminal phalangeal ; from the Isle of Wight. 



Fox Collection. 



36511. The extremity of a terminal phalangeal of a young indi- 



vidual ; from Cuckfield. 



Mantell Collection. Purchased, 1853. 



19979. Cast of the impression and counterpart of a hind foot. The 

 original was obtained from Hastings. 



Presented by Bennett Smith, Esq., 1846. 



R. 1146. Cast of the impression and counterpart of a hind foot. The 

 original was obtained from Hastings, and is figured (with- 

 out determination) by Tylor in the ' Quart. Journ. Geol. 

 Soc' vol. xviii. p. 248. Purchased. About 1863. 



Genus SPHENOSPONDYLUS, Seeley 1 . 



Several of the anterior dorsal vertebrae markedly opisthoccelous, 

 and the later ones with posterior cups to the centra, but no anterior 

 balls ; arches of dorsals very low, with the centrum long, moderately 

 compressed, wedge-shaped, and often with a hsemal spine or carina. 

 The rib-facet rises to the level of the neural platform in the dor- 

 sals. Teeth probably like those of Iguanodon. 



This genus, which is provisionally accepted, is regarded as pro- 

 bably connecting Iguanodon with Trachodon, the anterior dorsals 

 resembling those of the latter, while the later ones approximate to 

 those of the undetermined species of Iguanodon mentioned on p. 226. 



Sphenospondylus gracilis, Lydekker 2 . 



The type species. Typically smaller than Iguanodon mantelli. 

 Hab. Europe (England). 



Tlie following specimens were obtained from the Wealden of the Isle 

 of Wight, and, unless the contrary is stated, belong to the Fox 

 Collection. Purchased, 1882. 



R. 143. An imperfect vertebra, from near the extreme anterior 



1 Quart. Journ. Geol. Soc. vol. xxxix. p. 55 (1883). 



2 Ibid. vol. xliv. p. 47 (1888). 



