34 CHELONTA. 



Chelone benstedi (Man tell '). 



Syn. Emys benstedi, Mantell 2 . 



Cimo\_lio~]chelys benstedi, Owen 3 . 



The type of Cimoliochelys. Provisionally included in Chelone. 



Known only by young specimens, in which the carapace is very 

 long and narrow ; the neurals long and narrow, with the two lateral 

 surfaces ill-defined ; costals passing imperceptibly into the broad 

 ribs ; marginals very short, and the posterior ones with the free 

 border deeply notched. The intercostal sutures coincide with the 

 interneural sutures. 



Hab. Europe (England). 



28706. The imperfect shell of a young individual, with the ventral 

 {Fig.) surface embedded in matrix ; from the Lower Chalk of 

 Burham, Kent. The type specimen ; figured by Mantell 

 in the i Phil. Trans.' 1841, pis. xi., xii., and also by Owen 

 in his ' Cretaceous Reptilia ' (Mon. Pal. Soc.) pt. i. pis. i. 

 and ii. On lifting off the middle of the carapace the right 

 coracoid is seen underlying the vertebrae ; this bone being 

 of the longer slender type characteristic of Chelone, as 

 distinct from the allied genera. 



Mantell Collection. Purchased, 1853. 



39112. A carapace agreeing closely in size with the preceding ; 

 {Fig.) from the Middle Chalk of Kent. The anterior portion is 



wanting, and the marginals are displaced and thrust 



beneath the ends of the ribs. Figured by Owen, op. cit. 



pi. iii. The contour both of the neural bones and of the 



vertebral shields is distinctly shown. 



Bowerbanlc Collection. Purchased, 1865. 



38751. The posterior extremity of a very similar specimen ; from 

 the Chalk of Wouldham, near Rochester, Kent. This 

 specimen shows the pygal, suprapygals, the posterior 

 marginals, and the extremities of the ribs of the left side. 

 The notching of the marginals is very clearly shown. 



Purchased, 1862. 



R. 251. Fragment of chalk showing the hinder marginals of the 

 right side and some detached costals of an immature indi- 

 vidual ; from the English Chalk. 



Egerton Collection. Purchased, 1882. 



1 Phil. Trans, for 1841, pi. xi.—Emys. a Loc. cit. 



3 Eep. Brit. Assoc, for 1841, p. 176 (1842). 



