202 CHELONIA. 



Plesiochelys, sp. 



The following specimen indicates an individual of larger size than 

 the type of P. valdensis, to which species it shows affinity in the 

 width of the vertebral shields. 



Hah. Europe (England). 



37715. Slab showing the dorsal surface of an imperfect 2nd or 4th 

 costal ; from the Wealden of Cuckfield, Sussex. The 

 relatively lesser width of the vertebral shield distinguishes 

 this specimen from HylceoGhelys. 



Mantell Collection. Purchased, 1853. 



Plesiochelys (?), sp. 



Erom its elongated form the undermentioned specimen would 

 appear to indicate a species of the present genus, which may be 

 identical with the preceding form. 



Hah. Europe (England). 



2298. Slab exhibiting the dorsal aspect of an imperfect right hypo- 

 {Fig.) plastral ; from the Wealden of Cuckfield, Sussex. Figured 



by Owen in his ' Wealden and Purbeck Eeptilia ' (Mon. 



Pal. Soc), pt. i. pi. ix. fig. 4, as (?) Chelone costata. 



Mantell Collection. Purchased, 1838. 



The following specimen is not generically determinable. 



2336. Slab exhibiting the dorsal aspect of a right hypoplastral ; 

 {Fig.) from the Wealden of Cuckfield. Figured by Owen, op. cit. 

 pi. ix. fig. 2, as a hyoplastral of a species of Platemys. 



Generically Undetermined Specimens erom the Wealden, 

 some or all of which may belong to the Plesiochelyidae. 



2277. The imperfect left hypoplastral ; from Cuckfield, Sussex. 



(Fig.) Figured by Mantell in his ' Fossils of Tilgate Forest,' 



pi. vi. fig. 6. Inframarginal shields are shown. 



Mantell Collection. Purchased, 1838 



2314. An immature and imperfect left hypoplastral ; from Cuck- 

 (Fig.) field. Figured by Mantell, op. cit. pi. vii. fig. 5. 



Mantell Collection. 



10824. Fragment of rock showing the ventral surface of a costal of 



(Fig.) a very young Chelonian ; from Cuckfield. Figured by 



Mantell, op. cit. pi. vii. fig. 1. Mantell Collection. 



