Atavistic Races. 



483 



therefore, be directly compared with those on pages 470 

 and 480. The brackets in each case indicate the selected 

 seed-parent. 



HELIANTIiUS ANNUUS SYNCOTYLEUS. 

 ATAVISTIC RACE. 



4th generation 

 1897 



3d generation 

 1896 



2d generation 

 1895 



1st generation 

 1894 



Syncotylous 

 race, 1892 







15 



25 



35 45 



55 



65 



75 



9 



7 5 8 12 



85 



95 



1 5 12 



We see that the ininus selection has actually had its 

 effect in that direction. The extremes and the mean have 

 regularly decreased. The experiments correspond exactly 



Fig. TOO. Helianthus annuus syncotylctis. Hemi-sjncotyloiis 

 seedlings with various degrees of fusion of the cotyledons. 

 A and B small, C and D larger degrees of symphysis. 



with that with maize, which was represented in Fig. 18 

 on page 73 of the first volume, except that in this case 

 the change took place in the reverse direction. On the 



