CALVIN B. BRIDGES 



651 



Three of the vermilion daughters of Culture 3,987 were outcrossed 

 to facet vermilion forked males (Table V). 



The males of Table V showed that there was probably a decrease 

 of crossing over immediately to the right of the deficient region, 

 since the vermilion-deficiency sable crossover value was 7.4, instead 

 of 10.0, which is the normal vermilion-sable value. 



TABLE v 

 Offspring of Vermilion Females, Constitution 



Vermilion Forked Males 



Apr. 16, 1916. 



(^^/)' 



Outcrossed to Facet 



TABLE VI. 



/fa V f\ 



Offspring of Vermilion Females, Constitution ( ) from Table V, 



\ - sg / 



Outcrossed to Cut Vermilion Forked Males. 



May 8, 1916. 



Over a dozen vermilion-deficient females whose father was facet 

 vermilion forked were outcrossed to cut vermilion forked males, 

 though only three of these cultures produced offspring (Table VI). 

 The resulting data were rather insufficient, but indicated that there 

 was probably somewhat less than the normal amount of crossing over 



