Fig. 83. — Skeleton of Tetrahelodon luigustidens. 

 From the Middle Eocene of Sansaus, France. (B.M. Guide.) 



4 



4-i 



i 



A 



.;■ V 



•'*®*v,, '^^ 



""^N, 



■•>- --^j>- 



■ ^-»- . 



»AX 



Fig. 84. — Probable Appearance of Tetrahelodon (HKjustidens. 

 /From Sir Ray Lankester's Extinct Animals.) 



