CONTENTS. 



PAGE. 



Introduction Ill 



Methods 112 



Historical 112 



Connections between the outer supporting and hair-cells 116 



First stage of development 117 



Second stage of development 11!' 



Third stage of development 1 '-4 



Connections between the inner hair-cells and their sustentacular elements 125 



Significance of some of the so-called cells of Hensen 128 



Mitochondria and other structures in hair and supporting elements 129 



Hair-cells 129 



Supporting cells 132 



Summary 135 



Bibliography . 139 



Description of plates 141 



General abbreviations 142 



110 



