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 pp. 142. pis. 25. 191 1. 



5. GORTNER, R. A., Spiegler's "white melanin" as related to dominant and 

 recessive whites. Amer. Nat. 44:497. 1910. 



6. - , Studies on melanin: III. The inhibitory action of certain phenolic 

 substances upon tyrosinase. Jour. Biol. Chem. 10:113-122. 1911. 



7. GREGORY, R. P., Experiments with Primula sinensis. Jour. Genetics 

 1:73-132. pis. 3. figs. 2. 1911. 



8. KEEBLE, F., and PELLEW, Miss C., White-flowered varieties of Primula 

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9. KEEBLE, F., PELLEW, Miss C., and JONES, W. N., The inheritance of 

 peloria and flower-color in foxgloves (Digitalis purpurea}. New Phytol. 

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10. SAUNDERS, Miss E. R., On inheritance of a mutation in the common 

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 1911. 



11. SHULL, G. H., The "presence and absence" hypothesis. Amer. Nat. 

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12. - , A simple chemical device to illustrate Mendelian inheritance. 

 Plant World 12:145-153. pi. i. fig. i. 1909. 



13. - , Color inheritance in Lychnis dioica L. Amer. Nat. 44: 83-91. 1910. 



14. SPIEGLER, E., Ueber das Haarpigment. Beitr. Chem. Physiol. Path. 

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15. WOOD, T. B., Note on the inheritance of horns and face-color in sheep. 

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