CONTENTS xi 



Fig. 32, section showing arrangement of cancelli in the as- 

 tragalus 116 



v. os CALCIS 



Bone transmits whole body to the ground, and is also one 

 of the arms of a lever by which the body is raised from the 

 ground under the influence of muscular action .... 117 



Fig. 33, two series of cancelli 117 



The os calcis of man contrasts with that of other animals not 

 only in size, but in its internal arrangement, so that the 

 anatomist can determine ex calce hojninem 118 



The difference between hypothesis and fact in determining 

 final causes. Note by Cuvier 119 



The peculiar structure of the neck of the thigh and of the 

 astragalus seems to exist in man alone 120 



The structure of these bones in relation to locomotion . . 121 



Conclusion that the human skeleton deviates widely from 

 that of all brutes 122 



LIST OF SCIENTIFIC PAPERS AND WORKS BY JEFFRIES 

 WYMAN 123 



