278 



Shall. 



Table III. 

 Formula : XRF. XbF X XBF. Xbf. 



As all of the 11 broad-leafed males wliich occurred in the F» family 

 were used in these crosses, we are now able to classify that family 

 definitely on the basis of genotj'pic constitution, and to show that the 

 49 Fa individuals consisted of 



17 homozj'gous broad-leafed females, 

 15 heterozj'gous broad-leafed females, 

 11 heterozygous broad-leafed males, and 

 6 lioiiiozygous narrow-leafed males. 



It will be noticed in Table 111 that the iiroportious of the sexes 

 are almost completely normal, althougli the mother-plants for these 

 crosses were included in Table I among those wliich produced almost 

 no females when crossed with narrow-leafed males. The only striking 

 departure from the expected result, as shown in this table, is the occur- 

 rence of a narrow-leafed female. It is certainly a peculiar circumstance 



