CONTENTS. IX 



liarities in the Structure of the Lower Limbs, Thorax, Spine, 

 and Pelvis. 



The Erect Attitude natural to Man 117 



Certain Wild Men said to have been four-footed 118 



History of Peter, the Wild Boy — 



Conclusion,, that such Individuals are Specimens of Mal- 

 formation 122 



Peculiarities of Organization connected vs^ith the Biped 



Progression and Attitude of Man — 



Lower Limbs distinguished by their Length and Strength — 



Characters of the Human Femur 124 



Foot 125 



Earlier Ossification of the Foot — 



Peculiarities of the Human Pelvis 126 



Incurvation of the Sacrum and Coccyx peculiar to Man . . 127 



Muscles of the Lower Limbs ; — Glutei and Buttocks .... 128 



The Extensors of the Knee 129 



Muscles of the Calf — 



Human Thorax 130 



Contrast with that of Animals — 



Peculiarities of the Human Spine 131 



Animals are incapable of the Erect Attitude 132 



Chapter III. — On the Upper Extremities — Advantageous Con- 

 struction of the Human Hand. — Man is two-handed -, the Monkey 

 Kind four-handed. — On the Natural Attitude and Gait of 

 Monkeys, 



Comparison of the Upper and Lower Limbs 133 



Organization of the Hand 136 



Contrast with that of Animals I37 



Monkeys are four-handed 



And therefore organized for climbing 138 



They are not suited for the Erect Attitude, or Biped Pro- 

 gression 139 



The latter Attributes are therefore peculiar to Man 142 



Chapter lY .—Comparison of the Human Head and Teeth, 



to those of Animals — , 



The relative Proportions of the Cranium and Face differ in 



different Animals 143 



