TAB. XXIX. 

 Chelonia. 



Fig. 



1 . Side view of the fore part of the skull of the Platemys JBowerbanJcii, nat. size. 



2. Upper view of the same fossil. 



3. Side view of a fractirred tympanic bone of a large Turtle (CAelone), from Brackle- 



sham, showing the long and slender ossicle or 'columella' (16) in situ; nat. size. 



4. Extremity of the same tympanic bone, to which the ' membrana tympani' was 



attached. 



5. Proximal end of the femur of a very large Chelonian from the Isle of Sheppy, 



nat. size. 

 5'. Left femur of a Turtle (CAelone mydas) which weighed 150 lbs., nat. size. 



