EFFECT OF CONJUGATION 



313 



each set, and are presented, with the total number of fissions 

 during the periods, in the entry numbered 2. 



Examination of table 15 shows that the line 7 a, derived from 

 a conjugant, no longer differs in any very marked or constant 

 way in its rate of fission from the two derived from the non- 

 conjugants; it is certainly not slower in its rate than the others. 

 So far as the experiment goes, it indicates that after about two 

 months the rate of fission of the conjugants, which had been made 

 slower by conjugation, has regained about the usual rate. Owing 

 to the small numbers of diverse lines involved, such a conclusion 

 is of course not verv secure. 



TABLE 15 



Experiment 6. Paramecium aurelia. Relative numbers of fissions in certain per- 

 iods, and rates of fissio7i, in certain conjugant and non-conjugant lines, for the 

 last 44 days of an experimental slide culture that lasted 112 days from the time 

 of conjugation; also totals for the entire 112 days of the experiment. 



