GROWTH OF THE INNER EAR OF ALBINO RAT 



61 



Held ('09) and others have pointed out. Yet, according to 

 Retzius, the outer pillar develops in the rabbit earlier than does 

 the inner pillar. This result seems to me very peculiar, but, 

 at present, I am unable to explain it. 



In table 32 (charts 12 and 13) are given the values for the 

 radial basal breadth of the outer pillar cells. These data are 







25 50 50 100 200 300 400 



500 



Chart 12 The radial basal breadth of the outer pillar cell, table 32, figure 2, 

 distance 9. 







25 50 



50 100 200 300 400 500 



Chart 13 The radial basal breadth of the outer pillar cell, according to 

 the turns of the cochlea, table 32, figure 2, distance 9. 



derived from tables 22, 28, and 29. At the foot of the last column 

 are given the ratios from 1 to 546, 9 to 546, 12 to 546, and 20 

 to 546 days. The values increase rapidly during the earlier 

 stage, but after twelve days very slowly, as the ratios show. 

 The breadth is, at birth, largest in the basal and smallest 

 in the apical turn. Very soon, however (six days), the reverse 



