110 



CHELONIA. 



Ocadia crassa (Owen) \ 

 Syn. Emys crassus, Owen 2 . 



Emys hordwellierisis, Seeley 3 . 



Of comparatively large size. Hnmero-pectoral sulcus either cut- 

 ting entoplastral or confined to hyoplastral ; transverse diameter of 



Pig. 24. 



Ocadia crassa. — The plastron ; from the Upper Eocene of Hordwell. \. 

 ep.p, epiplastral ; ent.p, entoplastral ; hy.p, hyoplastral ; hp.p, hypo- 

 plastral ; x.p, xiphiplastral. 



entoplastral considerably exceeding the vertical (fig. 24) ; hypo- 

 plastrals and xiphiplastrals short ; xiphiplastral cornua pointed, and 

 borders of intervening notch emarginate ; femoral shield short. 

 As shown below, there are no characters by which the type 



1 Eeptilia of London Clay, &c. (Mon. Pal. Soc.), vol. i. pt. i. p. 76 (1849).— 

 2 Loc. cit. 

 Qaart. Journ. Geol. Soc. vol. xxxii. p. 445 (1870). 



