NUCLEOPLASMIC RELATIONS IN ARCELLA 



11 



TABLE 2 



Arcella dentata. Table 'presenting the data for thirteen cases of empty shell forma- 

 tion accompanied by nuclear doubling in lines 150.2a and 150.2b. The data 

 include the diameters and spine numbers of the uninucleate parents, of the empty 

 shells they produced, of the first offspring formed after throwing the empty shells, 

 and of the first offspring of the three succeeding generations. The unit of measure- 

 ment is 4-3 M 



TABLE 3 



Arcella dentata. Table showing the mean diameter and mean spine number of 

 thirteen parents, at the time of nuclear doubling in lines 150.2a and 150.2b, and 

 also of the empty shells and of the immediate offspring for four succeeding genera- 

 tions. The unit of measurement is 4-3 iji. 



