202 Brutlur aiid Sister Matin;/ 



therefore seem unwise to assume without pretty good evidence that any 

 form of inbreeding is equivalent to such a problem. 



However, as Bruce points out, the combined problem of random 

 mating and self-fertilization is directly important, since it is just the 

 sort of mating which occurs in certain problems. 



REFERENCES. 



1. Bruce, A. B. Journal oj Genetics, Vul. vi. 1917, ji. 105. 



2. ROBBINS, R. ]!. Gimctics, Vul. ii. 1017, p. 480. 



November 23, 1917. 



