388 



JULIA ELEANOR MOODY 



vegetative cells taken at random from the cultures. Although 

 a comparison of tables 1 and 2 shows an increase in length and 

 diameter of both nucleus and cell, an examination of the ratios 

 given in the last columns of these tables, indicates that the 

 growth of nucleus and plasma in the vegetative cells has been 

 unequal: that the normal kernplasma-relation has been dis- 

 turbed in favor of the plasma giving an average ratio of these 

 cells of 1:24.6. A comparison of the average coefficients at 

 these two stages of growth is of interest. This result was obtained 

 by expressing a ratio between the length and diameter of the 

 cell and the length and diameter of the nucleus as for example 



— :— in which L and D indicate the dimensions of the cell and 

 D d 



I and d those of the nucleus. An increase in size of this resul- 

 tant indicates an increase in size of the nucleus, a decrease in 

 the value of the coefficient, a corresponding decrease in the size 

 of the nucleus. Comparing tables 1 and 2, we find a decrease 

 in the average coefficient corresponding to the increased kern- 



TABLE 3 

 Division-stages of Spathidium spathula 



Average coefficient =112 



