PLESIOCHELYnXEl. 203 



2297. Mass of rock showing the ventral aspect of an imperfect 



(Fig.) right scapulo-precoracoid ; from Cuckfleld. Figured by 



Mantell," op. cit. pi. vii. fig. 6. Mantell Collection. 



3522. The imperfect proximal portion of a left femur ; from Cuck- 

 (Fig.) field. Figured by Mantell, op. cit. pi. viii. fig. 17. 



Mantell Collection. 



3569. A fibula, imperfect proximally ; from Cuckfleld. Figured by 

 (Fig.) Mantell, op. cit. pi. viii. fig. 15. Mantell Collection. 



3480. An imperfect limb-bone, in matrix ; from Cuckfleld. Fig- 

 (Fig.) ured by Mantell, op. cit. pi. viii. fig. 5. 



Mantell Collection. 



R. 1591. An imperfect right humerus ; from the YYadhurst Clay 

 near Hastings. The head is large and subglobular, 



Dawson Collection. Purchased, 1889. 



Skulls of Mesozoic Chelokians. 



Since there is at present no decisive evidence for referring the 

 undermentioned skulls to genera founded upon the evidence of the 

 shell, the whole of them are mentioned under one heading without 

 any attempt at referring them to their respective genera. 



R. 1510. Cast of an imperfect skull. The original was obtained 

 from the Lower Kimeridgian Lithographic Limestone of 

 Bavaria. It is figured by Cuvier in his ' Ossemens 

 Fossiles,' 2nd ed. vol. v. pt. ii. pi. xv. fig. 7, and again by 

 Riitimeyer in the ' N. Denkschr. schw. Ges. .Nat.' vol. xxv. 

 art. 2, pi. xiv. fig. 5, where it is provisionally referred to 

 Tropidemys. The grounds of this reference appear to be 

 the comparatively large size of the specimen and its 

 vaulted contour. The specimen presents a considerable 

 apparent resemblance to the larger skull from the Port- 

 landian figured by Owen in his .' History of British Fossil 

 Reptiles/ Chelonia, pi. viii. figs. 1-3, as Chelone planiceps \ 

 and subsequently made the type of the provisional genus 

 Stegochelys 2 . According, however, to Eiitimeyer the 

 present specimen has no distinct nasals. The temporal 

 fossa is extensively roofed. 



Mantell Collection. Purchased, 1838. 



1 Rep. Brit. Assoc, for 1841, p. 168 (1842). 



2 Lydekker, Quart. Journ. Geol. Soc. vol. xlv. p. 229 (1889).— See Addenda. 



