36 HEREDITY OF SKIN COLOR IN NEGRO-WHITE CROSSES. 



All of my observations made at Columbia, South Carolina, and 

 at Richmond, Virginia, showed that children of dark-colored parents 

 have, at birth, brown hair which darkens gradually. 



Eug. Fischer (1909, p. 1050) has described the hair color of the 

 "Rehobother Bastardfolk" of Damaraland, descendants of the Boers 

 (of Dutch origin) and the Hottentots. He says : 



Die Haarfarbe ist beim Erwachsenen so gut wie stets, dunkel, was sich 

 bei solcher Mischung leicht erklart, das vorhandene Pigment, auch in relativ 

 geringer Menge herrscht uber die Eigenschaft " Fehlen des Pigments " leicht 

 vor. Ganz auffallig ist nun, sie dunkeln dann beim Heranwachsen sehr 

 stark nach. 



Fischer adds that it occurs to him that all darkening of hair in 

 later life may be the result of hybridization, for Bantu negroes, Hot- 

 tentots, and many Mongolians are black-haired even as children and 

 do not darken subsequently. This suggestion is, it may be added, 

 quite in harmony with known facts of the slow development of pig- 

 mentation in simplex or heterozygous hybrids the diluted enzyme is 

 retarded in its action. 



TABLE 31. Hair color in negro X white crosses. 

 (A) BLACK X BLACK. 



; fl'x, flaxen; y. br., yellow brown; lt.br., light brown; m. br., medium brown; d. br., dark brown; 



N., black; cl. r., clear red; dk. r., dark red ; d. br. r., dark brown-red. 



* "Mulatto," one is 5 years, the other 16 months old. 



