CONTENTS 



PAGE 



THE FIRST MOUTHS ..... 92 



THE BEGINNINGS OF TEETH ... 97 



THE PRIMARY JAWS ..... 102 



THE RISE OF THE SECONDARY JAWS AND THEIR 



TEETH ....... 106 



origin of the mammalian palate . .118 



evolution of the tongue and related 



structures . . . . . .123 



origin and evolution of the human lips 129 



later stages in the history of the teeth 134 



conclusions ...... 152 



History of the Nose ..... 153 



Optical Photography and its Results . 173 



the human eyes as instruments of precision 173 

 the eyes of invertebrates . . .173 



origin of the paired eyes of vertebrates 182 

 origin of the human eyes . . . 188 



conclusions ...... 200 



Primitive Sound Recorders . . . 202 



Ancient and Modern Physiognomy . . 220 



The Face of the Future .... 240 



Looking Backward ..... 245 



LITERATURE CITED 247 



INDEX 261 



Xll 



