PIGMENTATION IN OLD AMERICANS HRDLICKA. 



469 



The brown eyed show but a few light haired and these generally 

 of the least blond variety ; they have— somewhat less frequently than 

 either the light or the mixed eyed— hair of medium shade ; but they 

 show in nearly half the instances dark hair to black. Also they show 

 the least reds and those only in association with the lighter browns 

 of the iris. 



Still further insight into these conditions may be obtained if the 

 data are studied with a little more detail : 



Old Americans: Correlation of eye and hair pigmentation, details, ooth sexes? 



(Percentage in round numbers.) 



Hair. 



Eyes. 



Pure lights: 

 Blues- 

 Light 



Medium 



Deep 



Other lights: 



Greenish and greenish-blue . 



Gray and grayish-bluo 



Mixed 



Pure browns: 



Light 



Medium 



Dark 



Lights. 



Per cent. 

 53 

 35 

 25 



31 

 34 

 19.5 



22.5 

 9.5 

 4 



Medium . Darks 



Per cent. 

 43 

 48 

 50 



50 



52.5 



50.5 



50 

 50 

 22.5 



Per cent. 

 2.5 

 14 

 20 



15.5 

 13.5 

 25.5 



27.5 



38 



73.5 



i Reds need not be considered in this connection. 



The above figures show conditions very clearly. The lighter the 

 blue eye the greater the proportion of light hair and the smaller 

 that of medium and especially dark hair ; the deeper the blue, the less 

 light, the more medium, and especially the more dark hair. It is 

 plain that there is a direct correlation between the depth of the blue 

 in the iris and the amount of pigment in the hair. This corroborates 

 the view that the pigment in the blue eye is not different from that 

 in the brown eye, but is merely less in quantity and differently 

 deposited. The greenish and grayish eyes, in relation to hair, are 

 much like the medium blue, though showing somewhat more medium 

 hair. Possibly they hide some mixtures. The brown-eyed show 

 the same type of correlation as the blues — the darker the eye the 

 less light, and even medium, and the more dark the hair. Those with 

 dark-brown eyes have no blonds proper, but a few instances of light- 

 brown— not blond— hair and less than one-fourth of medium, but 

 in nearly three-fourths the hair is dark to blaek. 



The above shows that in general the more pigment there is in the 

 eye the more there is also in the hair. There are individual excep- 

 101257—23 31 



