44 



CONTENTS. 



Introduction I 



External appearance of Genicula _ 4 



The Position of Genien la 7 



A. Normal Position 8 



]). Abnormal Position 12 



Relative Position of the Genicular and the Articular Cells 13 



Structure of Genicular Cells and Comparison with Articular Cells. 17 



Formation and Development of the Geniculum 26' 



The Difference in the Properties of the cellwall of Articular and 



Genicular Cells 33 



The Value of the Geniculum as a Systematic Character 40 



Literature Consulted 42 



Explanation of Plate 45 



