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K. S. LASHLEY 



form an almost mibroken series from the smallest to the largest, 

 and, lacking evidence upon the environmental conditions, give 

 little indication of the existence of diverse races. Further 

 analysis mdicates that the clones tended to become more alike 

 after they had been kept under cultivation for some time. The 

 average number of tentacles of the offspring of each of the 26 

 'stem parents' and the average of all their later descendants 

 were computed and are given in table 4. The descendants of 

 parents with extreme variations tend to revert to the mean. 



The coefficients of correlation between parent and offspring 

 within the clones (table 3) are extremely variable, but the 



TABLE 3 



Correlation between parent and progeny within each of Hanel's clones 



TABLE 4 



Regression in the first and later generations of the descendants of Hanel's 



36 'stem parents' 



