KINE TO GENESIS. 



307 



the principal impact in progression are those which 

 increase in length. In digitigrade animals it is the feet 

 which receive the impact of the repeated blows on the 



Ca 



TVti 



lAf» 



Fig. 83. — Pes of [A) Merychochcerns montanus from Scott ; (B] Bos taunts, 

 much reduced. Ca, Calcaneum ; As, Astragalus; Na, Navicular; A'ed, Na- 

 viculocuboid ; Cu, Ah'c, Ecto-mesocuneiform ; Mi, Metatarsals (cannon bone); 

 £nc, Entocuneiform. 



earth while in progression, while supporting the weight 

 of the body at every stage of the process. In planti- 

 grade animals it is the soles of the feet, and the bones 

 of the leg in line with them, which receive the impact, 



