PHYSIOLOGICAL VARIATIONS IN PARAMECIUM 



487 



Diagram 3 



lines. The test was repeated November 22 with the same result 

 but this time only 4 pairs appeared in J 1 and only 63 in J 21, 

 none in the others, A third test from the same rich cultures was 

 made November 27 and gave negative results for all 24 lines. 

 The complete record by months of the J series and the division 

 rates in October and March are shown in diagram 3. 



New rich cultures of all lines of the J series were seeded during 

 the last week in November and the first test was made on De- 

 cember 1, a second on December 3, and 4. The result of these 



