52 



ANATOMICAL AND PHYSIOLOGICAL STUDIES ON 



From the data given by Retzius ('84) we get the values in jx 

 of the radial basal breadth of the inner pillar in the rabbit and 

 cat as follows (table 21). 



Comparing these values with my own, it is to be noted that 

 Retzius' measurements in the rabbit agree perfectly at the 

 earliest stage with those in the albino rat. Also we find in the 



TABLE 20 Condensed 



Ratios of the radial basal breadth of the inner pillar according to the turns of the 



cochlea on age 



TABLE 21 



Radial basal breadth of inner pillar in n (Retzius) 



rabbit at seven days values homologous with those obtained in 

 the albino rat at fifteen days of age, only in the rat the breadth 

 is absolutely greater. In the cat the values at seven days of 

 age are about the same, or a bit smaller, than those in the albino 

 rat. Here again the rabbit is a trifle more precocious than the 

 rat, and the cat much more so. 



Table 22 (chart 9) shows the values for the radial distance 

 between the outer corner of the inner pillar (not pillar cell) 



