CONTENTS 



PAGE 



BIOGRAPHICAL NOTE. BY R. R. MARETT . xi 



CHAPTER I 

 INTRODUCTORY: GROWTH. STRUCTURE OF THE GERM-CELLS 1 



CHAPTER II 

 CLEAVAGE .37 



CHAPTER III 

 DIFFERENTIATION 70 



LITERATURE 113 



APPENDIX. CHARTS DEALING WITH TROUT LARVAE . 120 

 INDEX . 123 





