TABLE OF CONTENTS 



Page 



Introduction 1 



Historical Sketch 2 



Methods ! 4 



Investigation : 



I. Primitive Vitreous Body 6 



II. Period of Mesodermal Invasion of Vitreous Body .... 11 



III. Permanent Vitreous Body 18 



Conclusions 25 



Literature , 26 



Explanation of the Figures 31 



