132 
GENETICS: C. B. BRIDGES 
Proc. N. A. S. 
» Since figure 1 was drawn (Oct. 15, 1920) a mutant (M-23) has been located at 101 
in chromosome III, and there has been found to be about 1 % of crossing over between 
bent and eyeless in the fourth chromosome. (Scarlet is at 41.5, Chromosome III.) 
