64 



ANATOMICAL AND PHYSIOLOGICAL STUDIES ON 



authors. Now, the view of Bottcher ( '69) is generally accepted. 

 This large prominence vanishes during development, and instead 

 of it a deep and wide furrow lined with low epithelium appears. 

 These epithelial cells become peripherally higher and finally lean 



TABLE 35 



Radial distance between habenula perforata and the outer corner of the outer pillar 

 cells at base on age (chart 14)- For the average values 

 see the third column in table 9 



Ratios 1 12 days 

 1 20 " 

 1546 " 

 20546 " 



1.4 

 1.4 

 1.6 

 1.1 



: 1.7 

 : 1.6 

 :1.8 

 : 1.1 



1 -2.0 

 :2.0 

 :2.2 



1 :2.1 

 :2.0 

 :2.2 

 : 1.1 



: 1.8 

 : 1.8 

 : 1.9 

 : 1.1 



100 



80 



60 



40 



AG^E DAYSH 



O 



25 5O 50 too 2OO 3OO 40O 500 



Chart 14 The radial distance between the habenula perforata and the 

 outer corner of the outer pillar cell at base, table 35, figure 2, distance 5. 



