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ANATOMICAL AND PHYSIOLOGICAL STUDIES ON 



relation appears, and the breadth increases from the base 

 to turn III relatively rapidly, but from turn III to IV slowly. 

 In table 33 the ratios are given in a condensed form. The radial 

 breadth of the outer pillar cells as given by Retzius ('84) are 

 as follows (table 34.) 



TABLE 33 Condensed 



Ratios of the radial basal breadth of the outer pillar cells on age according to 



turns of cochlea 



TABLE 34 

 Radial basal breadth of the outer pillar cells in n (Retzius) 



This table shows that the breadth of the outer pillar cell in- 

 creases in the rabbit and the cat continuously from birth to 

 old age, as I have found in the rat. Also the value is generally 

 smallest in the base, largest in the apex, though there are some 

 exceptions. The main differences between the results of Retzius 

 and mine is that the values in the rabbit are larger than in the 

 rat. This is probably due to the differences in the size of the 

 animals. 



