GROWTH OF THE INNER EAR OF ALBINO RAT 



127 



Table 97 enables us to compare the ratios in the diameters of 

 the cell bodies and their nuclei in turns I, II, III, and IV in the 

 condensed age groups. In both the cell bodies and their nuclei 

 the ratios become slightly larger in passing from the basal toward 

 the apical turn, except in the one day group, which it reversed. 



On the comparison of the diameters of the nerve cell bodies 

 and their nuclei in the ganglion spirale according to sex. For 

 this comparison seven age groups were used. In each age group 

 we have sometimes one, sometimes two cochleas of the same sex. 



20 



M 



15 



10 







25 



50 



50 '00 200 300 400 500 



Chart 40 Showing the computed diameter of the largest cell bodies and their 

 nuclei from the ganglion spirale, table 95. 



Diameters of the cell bodies. 



Diameters of the nuclei. 



In the latter case the average value is recorded. In table 98 

 are given the values for these diameters, and it is plain that 

 there is no significant difference in these values according to sex. 

 On the comparison of the diameters of the nerve cell bodies 

 and their nuclei in the ganglion spirale according to side. For 

 this purpose fourteen age groups were employed. In most 

 cases two cochleas from the same side were used in each age group. 

 In these cases the average value is recorded. Table 99 shows the 

 values for the diameters of the cell bodies and their nuclei accord- 

 ing to side, but reveals no evident difference in this character. 



