CONTENTS. | 
CHAPTER IX. 
THE CHARACTERS OF GENERA. . ec «© 0 
CHAPTER X. 
SPECIES AND BREEDS” ~.°* 3° <3" *. S 40 Oe 
CHAPTER XI. 
FORMATION OF CORAL REEFS . « © © 6 e e 
CHAPTER XII. 
AGE OF CORAL REEFS AS SHOWING PERMANENCE OF SPECIES 3 
3 CHAPTER XIII. 
HOMOLOGIES gota EGS: ON gegen 
CHAPTER XIV. 
ALTERNATE GENERATIONS a Es Re et ae 
CHAPTER XV. 
THE OVARIAN EGG. e ° e e r r ® e 
“CHAPTER XVI. 
EMBRYOLOGY AND CLASSIFICATION . = : - F ‘ 
48 
