TESTUDINID.E. 119 



Pectoral shield extremely short antero-posteriorly, its length being 

 less than half that of the abdominal. 

 Bob. Europe (England). 



39767. The imperfect shell; from the London Clay (Lower Eocene) 

 (Fig.) of the Isle of Sheppey. The type specimen. Described 

 by Owen in the 'Rep. Brit. Assoc' for 1841, p. 162, and 

 figured by him, from the anterior extremity, in his ' Reptilia 

 of the London Clay, &c.,' pi. xxiv. fig. 6 (in the description 

 of the plate the other figures are incorrectly grouped under 

 this name). Of the carapace only portions of the left side 

 are preserved, but these are sufficient to indicate the con- 

 tour of the neural bones and vertebral shields, which 

 appear to have been very like those of the next species. 

 The plastron, which is imperfect anteriorly and posteriorly, 

 is represented in the accompanying woodcut (fig. 26). 



Bowerbank Collection. Purchased, 1865. 



Chrysemys bicarinata (Bell x ). 



Syn. Emys bicarinata, Bell 2 . 



Clemmys bicarinata, Lydekker and Boulenger 3 . 



Carapace somewhat depressed, with strongly marked costal carina. 

 Pectoral shield comparatively long, its length considerably exceeding 

 half that of the abdominal. Fully equal in size to the preceding 

 species. 



Hab. Europe (England). 



39450. The imperfect shell ; from the London Clay (Lower Eocene) 

 (Fig.) of the Isle of Sheppey. The type specimen. Figured by 

 Bell in the ' Heptilia of the London Clay, <fcc.' vol. i. pt. i. 

 pis. xxv., xxvi. The neural bones and vertebral shields 

 of the carapace are well shown. The boundaries of most 

 of the plastral shields are also visible, although somewhat 

 indistinct ; and the contour of the entoplastral can also 

 be faintly traced. 



Bowerbank Collection. Purchased, 1865. 



Genus HARDELLA, Gray 4 . 

 Shell (fig. 27) with the general characters of the typical group of 

 Kachuga, but with the 4th vertebral shield not longer than the 3rd, 



1 Owen & Bell, Eeptilia of London Clay, &c. (Mon. Pal. Soc), vol. i. pt. i. 

 p. 73 (1849).— Emys. ' 2 Loc. cit. 



3 Geol. Mag. decad. 3, vol. iv. p. 275 (1887\ 



4 Supplement to Catalogue of Shield Keptilce, pt. i. p. l>8 (1870). 



