202 Brother and Sister Mating 



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 of Genetics^ A^'ol. vi. 1917, p. 195, 



2. ROBBINS, R. B. Genetics, Vol. n. 1917, p. 489. 



November 23, 1917. 



