Contents 



Intboduction 



CHAPTER I 



Early Youth 



CHAPTEB II 

 At the University 



CHAPTER ni 

 The Radiolaria 



CHAPTER IV 



Darwin 



• 



4438S2 



9 



. 15 



. 51 



. 82 



. 102 



CHAPTER V 



The Scientific Congress of 1863 . . . 144: 



6 



