INHERITANCE IN ASEXUAL REPRODUCTION 



179 



TABLE 12 



Distribution of variations in samples taken from 7nass cultures 



Polyps from mass cultures to which no food had been added for one 

 month showed the distribution of table 12, III. The constants for 

 these groups are: 



Mean number of 



tentacle!! <J 



Clone A 6.70±0.00 0.6403 



Clone D 5.48±0.05 0.4995 



Difference (A - D) 1.22=t0.08 



The samples recorded in table 12, IV, were taken from mass cultures 

 three months old. The constants for these groups are: 



Mean 7}U7nhcr of 



tentacles er 



Clone A 6 .80±0 .06 .6000 



Clone D 5.52±0.05 0.5380 



Difference (A - D) 1.28±0.08 



' The Hydras in one pair of cultures were given ver}^ little food for 

 three months and the water in the cultures was changed very rarely. 

 As a result of these unfavorable conditions the polyps in both cultures 

 were very much reduced in size and in number of tentacles. Clone A 

 was most affected but the difference between the clones persisted even 

 here, as the following constants for these populations show : 



THE JOUR>r.\.L OF EXPERIMENTAL ZOOLOGY, VOL. 19, NO. 2 



