720 THE AMERICAN NATURALIST [Vol. XLIV 



V. 21, M. (Irish origin), brunet, black hair, blue iris. 



VI. 10, J. V., Brunet, brown hair, blue iris. 



VI. 11, S. G-., Intermediate complexion, brown hair 

 and iris. 



VII. 15, A. V., Aged 18, albino, white hair, colorless 

 iris, retina pinkish, nystagmus present, mentally quick. 



VII. 18, L. V., Aged 24, albino, white hair, colorless 

 iris. 



V. The Condition of Hair and Eye Color in the Pig- 

 mented Parents of Albinos 



Assuming all pigmented parents of albinos to be sim- 

 plex in pigment we may inquire if such simplex parents 

 differ from the population at large in their hair and eye 

 color. To get an answer to this inquiry Table IX has 

 been drawn up. 



This table is summarized in Table X, so as to bring 

 out the relative frequency of the different types. 



TABLE X 



The Relative Frequency of the Different Types of Hair and Eye 

 Color in the Parentage of Albinos 



If Table X be compared with the proportional dis- 

 tribution of the different types of hair color in the pop- 

 ulation at large, certain differences are seen. Thus while 

 black, dark brown and brown hair constitute in a random 



