? 



TABLE IX. 



Fig. 1 . The inner surface of the ri^ht hyosternal bone of Platemys MantelU ; half 



nat. size. From the Wealden of Tilgate Forest. Mantellian Collection, in 



the British Museum. 

 Fig. 2. The inner surface of a portion of a hyosternal bone of another species of 



Platemys ; half nat. size. From the Wealden of Tilgate Forest. Mantellian 



Collection, in the British Museum. 

 Fig. 3. The left hyosternal bone of Platemys Bixoni ; half nat. size ; (figured upside 



down.) From the Wealden of Tilgate Forest. Mantellian Collection, in 



the British Museum. 



