TRANSITIONS IN MORPHOLOGICAL CHARACTERS 



109 



where the humped tjqoe developed that the rotifers were larger 

 and more active than in the other cultures. They were also good 

 feeders and their food was usually all eaten at each feeding time ; 

 while in the other cultures an excess remained. However, quanti- 

 tative changes in the food supply did not modify the results. 



From the other two individuals E and F, were developed, as 

 before stated, pedigree lines. From E were bred twenty-two 

 generations, while from F thirty-eight were bred. Their his- 

 tories are given in tables 8 and 9 respectiveh\ 



TABLE 7 



History of mass cultures 



