GROWTH OF THE INNER EAR OF ALBINO RAT 



167 



birth, but in the earlier stages after birth grow very rapidly, 

 reach at twenty days their maximum size, and then diminish 

 slowly. This great difference in the course of growth is prob- 

 ably related to the maturity of the functions of the animal. 



TABLE 122 



Giving the mean, standard deviation and coefficient of variability with their respective 

 probable errors for the diameters of the cells in the ganglion 

 vestibulare on cross-section 



TABLE 123 

 Ratios of diameters between the ages given. 



As a consequence, in the nucleus-plasma ratio there is also 

 a large difference between the cells in the two ganglia. Table 124 

 shows this. 



The ratio at birth in the ganglion vestibulare is large as com- 

 pared with that in the ganglion spirale, but the increase in this ratio 



