CONTENTS. 



Page 



A. Statement of the problem i 



B. Method of investigation i 



C. Evaluation of the data 2 



D. Ontogenetic development of the skin color of the negro 4 



E. Results: 



I. The skin color of Caucasians in Bermuda and Jamaica 8 



II. Quantitative determination of the skin color of pure-bred negroes 8 



III. Skin color of the children of a negro and a Caucasian (the Fi generation).. 10 



IV. Skin color of the children of two mulattoes (the F 2 generation) n 



V. Hypothesis 12 



VI. Test of the hypothesis 15 



VII. Is there a sex-linkage or sex-dimorphism in skin color? 24 



VIII. Do the children "take after" the mother and father equally? 25 



IX. Selection of mates "grading up" to white 25 



X. The agreement of the hypothesis with popular observation and nomencla- 

 ture 27 



XI. The yellow element in the skin color 28 



XII. The "fixed white," the "pass for white," and the "white by law" 28 



XIII. Reversion to black skin color 29 



F. Discussion of inheritance of traits associated with skin color: 



I. Eye color 32 



II. Hair color 35 



III. Hair form 39 



G. Correlation of characteristics in hybrids 44 



I. Correlation between the color of the skin and of the hair in the F2 gen- 

 eration 44 



II. Correlation between color of the skin and form of the hair in the F2 gen- 

 eration 45 



H. Fecundity of hybrids 46 



I. Summary of conclusions 46 



K. Literature cited 47 



Appendix A: 



I. Bermudian families 49 



II. Jamaican families 71 



III. Louisianian families 102 



Appendix B. Social data concerning miscegenation 105 



