116 



CHELONIA. 



The French specimens of this and the preceding species show that 

 the difference in the contour of the entoplastral is not dependent on 

 differences of age. 



Hah. Europe (England and France). 



36811. 



{Fig.) 



Portions of the carapace and plastron of a young individual ; 

 from the Upper Eocene (Lower Oligocene) of Hordwell, 

 Hampshire. The type specimen. The portion of the 

 carapace comprises the 4th neural, and the 3rd, 4th, 5th, 

 and 6th costals of the right side. The plastron is shown 

 in jig. 25, with a restoration of the missing portions. The 

 entoplastral is as long as broad, and thus resembles Ocadia 



Fig. 25. 



Ocadia owcni.— The plastron; from the Upper Eocene of Hordwell. f. 

 ep.p, epiplastral ; ent.p, entoplastral ; hy.p, hyoplastral ; hp.p, hypoplastral ; 

 x.p, xiphiplastral. 



sinensis, although distinguished by the humero-pectoral 

 sulcus being entirely on the hyoplastral. The contour of 

 the whole plastron is practically identical with that of the 

 existing Ocadia. Presented by S. Laing, Esq., 1862. 



