No. 528] SKIN PIGMENTATION IN MAN 721 



population (Holmes and Loomis, 1909, p. 55) 695 out of 

 853 persons, or 81.5 per cent., in Table X, they consti- 

 tute only 65 per cent. On the other hand, while, accord- 

 ing to Holmes and Loomis (1909, Table III), red and 

 auburn constitute only about 5.5 per cent, of their popu- 

 lation, the various forms of red constitute 16 per cent, of 

 the population of Table X, or three times the typical 

 proportion. It appears then that, on the whole, the pig- 

 mented ancestry of albinos shows an excess of red and 

 the weaker grades of melanic pigment. 



The distribution of eye color, on the other hand, shows 

 little that is abnormal. The il blacks" are somewhat 

 deficient, about 70 per cent, as abundant as in the popu- 

 lation as a whole, the browns are in excess, and the blues 

 occur in nearly normal proportions. The last result was 

 hardly anticipated as it might have been expected that 

 the pale blue iris of the albino would be specially apt to 

 proceed from blue-eyed parents, but this is not so. As 

 a matter of fact, dark brown eyes are quite compatible 

 with recessive albinism as Table XI shows. The general 

 teaching of Table XI is that the heterozygous or simplex 

 pigmentation of the offspring is not always clearly less 

 than that of the darker parent. But, on the whole, blue 

 iris predominates slightly and the hair tends to run 



TABLE XI 



