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 Erwachsencn so gut wie .stets, dunkel, was sich 

 bci solchcr Mischung Icicht crkliirt, das vorhandene Pigment, auch in relativ 

 geringcr Mcngo hcrrscht ubcr die Eigcnschaft " Fchlon des Pigments " leicht 

 vor. Ganz aufTallig 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 willa known facts of the slow development of pig- 

 mentation in simplex or heterozygous hybrids — the diluted enzyme is 

 retarded in its action. 



Tulnl, 



Table 31. — Hair color in negro X while crosses, 

 (A) BLACK X BLACK. 



br. br, br. br. 



a i 3 



V i 1 



It JO As 



N 



iS' 



N 



N (?) 



N 



N 

 N 

 N 



N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 



N (?) 

 m. br. 

 It, br. 



N 

 N 

 N 



N 



N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 

 N 



dk. br, 

 dk. br. 



•N' 



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



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



^ Mulatto," one ia 5 years, the other 16 montbi old. 



