SCELIDOSAT7KID.2E. 185 



and the lozenge-shaped section anteriorly, it approximates 

 to the mandible of Sceliclosaurus. 



Mantell Collection. Purchased, 1838. 



Genus HYUEOSAURUS, Mantell 1 . 



The teeth provisionally referred to this genus have no serrations 2 . 

 The anterior dorsal vertebras have broad centra, with a thick haemal 

 ridge, while the later ones are compressed and show a distinct lateral 

 hollow; posterior chevrons ant ero -posteriorly elongated inferiorly. 

 Dermal spines much compressed, convex anteriorly and concave 

 posteriorly, and sometimes comparatively narrow ; probably placed 

 in the anterior part of the trunk. Preacetabular process of ilium 

 (provisional) laterally compressed. Feet unknown. 



Hylseosaurus oweni, Mantell I 



The type species. The type specimen indicates an animal consi- 

 derably smaller than the type of Sceliclosaurus harrisoni, but other 

 specimens provisionally referred to the same species are of larger 

 size, and may be distinct. 



Hah. Europe (England). 



All tlie following specimens arc from the Wealden. 



2310, 3326. Several teeth, resembling those figured by Owen in his 

 ' Wealden and Purbeck Eeptilia ' (Mon. Pal. Soc), pt. iv. 

 pi. viii., and provisionally referred to this form ; from 

 Cuckfield, Sussex. Mantell Collection. Purchased, 1838. 



26034, 36488. Two similar teeth ; from Cuckfield. 



Mantell Collection. Purchased, 1853. 



43172. A similar tooth ; from Cuckfield. 



Wetherell Collection. Purchased, 1871. 



R. 739. A similar tooth ; from the Wadhurst Clay (Lower Wealden) 

 of Silver Hill, near Hastings, Sussex. 



Dawson Collection. Purchased, 18S6. 



R. 647. two similar teeth ; from Battle, near Hastings. 



Presented by J. E. Lee, Esq., 1885. 



1 Proc. Geol. Soc. vol. i. p. 411 (1834). 



2 Teeth of similar type are provisionally referred to Crataomus (Quart. Journ. 

 Geol. Soc. vol. xxxvii. pi. xxvii. figs. 13, 14), another member of this family. 



3 ■ Medals of Creation,' 1st ed. p. 734 (1844). 



