NUCLEOPLASMIC KELATIONS IN ARCELLA 



39 



TABLE 10 

 Arcella polypora. Table shovoing the distribution of the diameters of the shells 

 within thirteen families during the first period (March 18 to May 10, 1918). The 

 unit of measurement is 4-S n 



TABLE 11 

 Arcella polypora. Correlation table for diameter of the shell in parents and progeny 

 within twenty -five small families. The unit of measurement is 4.3 ix. Coefficient 

 of correlation, 0.1 Jfi ± 0.018 



