IV CONTENTS. 



CHAPTER X. 



STRUCTURE AND ECONOMY OF BONE G4 



CHAPTER XI. 



THE MODE OF REPRODUCTION AFTER DEATH OF THE SHAFT 



OF A LONG BONE 68 



CHAPTER XII. 



THE MODE OF REPRODUCTION OF LOST PARTS IN THE 



CRUSTACEA 7 i 



CHAPTER XIII. 



ANATOMY AND DEVELOPEMENT OF THE CYSTIC ENTOZOA .. ..76 



