170 



K. S. LASHLEY 



Conditions producing like variations in parents and offspring 



Age. Corresponding to the increase in the number of ten- 

 tacles with the age of the parents, the buds produced by old 

 polyps have, on the average, more tentacles than those pro- 

 duced by young ones, that is, there is an increase in the number of 



6.5_ 



6.0 



5.5 



30 



Fig. 2 Increase in the average number of tentacles of successive buds pro- 

 duced by the same parents. The ordinates represent the mean number of ten- 

 tacles of the successive buds. The abscissae represent for Clone A the successive 

 buds produced by 70 parents, for Clone D the buds produced on successive days 

 after the 40 parents which furnished the basis of the curve began to produce buds. 



tentacles of successive buds with the increasing age of the parent. 

 Figure 2 shows this condition clearly. Data from two clones are 

 included in this figure; for clone A the average number of ten- 

 tacles of the first, third, fifth, seventh, etc., buds are given in the 

 graph; for clone D the averages of all buds produced during sue- 



