TABLE 3 



Mean length ft for 86 lines of Paramecium caudatum {2687 individuals), derived from 

 the two members {a and b) of 43 pairs; together with the number of individuals 

 measured for each line. The lines are designated by the same numbers used for 

 these particular lines in table 61 of the authors' former paper {'IS). The lengths are 

 given in units, each of which is equal to 4 inicrons; so that to obtain the lengths in 

 microns, each is to be multiplied by 4. 



197 



