xii Contents 



Conclusions : 



(1) The Morphological Conception of Sex Determination . 420 



(2) The Physiological Conception of Sex Determination . . 421 



(3) Analysis of the Results ....... 422 



EXPERIMENTAL STUDY OF SECONDARY SEXUAL 

 CHARACTERS 



CHAPTER XXVIII 



SECONDARY SEXUAL CHARACTERS 429 



Introduction ........... 429 



Correlation between the Secondary Sexual Characters and the Essential 



Organs of Reproduction . 432 



CHAPTER XXIX 



SECONDARY SEXUAL CHARACTERS (Continued} 439 



Theories of the Origin of Secondary Sexual Characters . . . 439 



INDEX 449 



