Life Cycle of Hydatina Senta 



321 



of Experiment I., were isolated. One with its progeny was abun- 

 dantly fed (five to ten drops of the culture) on what was considered 

 the best food. The other with its progeny was fed only so much 

 as was judged would be necessary to maintain life and enable 

 them to produce a moderate family. The shorter families indi- 

 cate that partial starvation actually occured, but this starvation 



TABLE II 



Showing the number of male- and jemale-prnducers in two series of generations from related parents, both 

 series being reared under like conditions. 



