KINE TO GENESIS. 



299 



diplarthrous ungulate, we shall see that as the foot is 

 planted on the ground the prominent flexures of the 

 limbs, the elbow and gambril joints, are turned in- 



Radius 



Ulna 





Scaphoid || Lunar (| Cuneif. \ 



Trap. 



follex Index Me.d* Ann'. Minimf 



Index Ned'. Ann*. 



Fig. 78. Diagram of carpus of a Taxeopod (A) and (B) of a diplarthrous 

 ungulate. From Osborn. 



wards, so that the limb, were it free from the ground, 

 would be twisted or rotated on its long axis from 

 within, forwards and outwards. As the foot rests on 



Fig. 79. Raccoon pacing, showing right fore foot just before recovery. 

 From H. Allen. 



the ground, the limb experiences a torsion strain in 

 the directions mentioned. This throws the weight on 

 the interior bones of the lower legs, the radius and the 

 tibia. Thus these bones have acquired a great supe- 



