DEVELOPMENT 



459 



remains in doubt. Felix (Keibel and Mall's "Human Embryology," vol. 2) 

 inclines to the view that in man the primordial germ-cells (primitive geni- 

 tal cells) disappear, and that they bear no genetic relationship to the primi- 

 tive germ-cells (secondary genital cells) of the gonad. 



Table of the Adult Male and Female Derivatives of the Fetal 

 (Indifferent) Reproductive System. 



(The vestigial structures are given in italics, synonyms in parentheses.) 

 INTERNAL GENITALS. 



EXTERNAL GENITALS. 



