vni.] DISCUSSION OF THE DATA OF EYE COLOUR. 143 



Percentages of the Various Eye-colours in Four Successive Generations. 



Number 



of 

 cases 



913 



1515 



1477 



585 



2277 



2213 



4490 



Generation IV. 



Ill- 



Total Males 



,, Females 



Total cases 



FIG .16. 



