1910] SHULL INHERITANCE OF SEX IN LYCHNIS 125 



color curve derived from the same families is nearly normal; with the 

 mean departing but little from the 50 per cent, required by Mendelian 

 theory. 



STATION FOR EXPERIMENTAL EVOLUTION 

 COLD SPRING HARBOR, LONG ISLAND 



LITERATURE CITED 



1. BATESON, W., Mendel's principles of heredity, pp. xiv+396. Cambridge: 

 University Press. 1909. See pp. 164-195. 



2. CASTLE, W. E., The heredity of sex. Bull. Mus. Comp. Zool. Harvard 

 40:189. 1903. 



3. , A Mendelian view of sex-heredity. Science N. S. 29:395-400. 1909. 



4. CORRENS, C., Bestimmung und Vererbimg des Geschlechtes. pp. v+8i. 

 figs. p. Leipzig: Gebr. Borntraeger. 1907. 



5. DONCASTER, L., Recent work on the determination of sex. Sci. Progress, 

 no. 13, pp. 90-104. 1909. 



6. DONCASTER, L., AND RAYNOR, G. H., Breeding experiments with Lepidop- 

 tera. Proc. Zool. Soc. London i : 125. 1906. 



7. JOHANNSEN, W., Elementc der exacten Erblichkeitslehre. 8vo. pp. vi+5i6. 

 fiS s - 3 1 - Jena: Gustav Fischer. 1909. 



8. MORGAN, T. H., A biological and cytological study of sex determination in 

 phylloxerans and aphids. Jour. Exper. Zool. 7 : 239-352. pi. i. figs. 23. 1909. 



9. SHULL, G. H., The "presence and absence" hypothesis. Amer. Nat. 43: 

 410-419. 1909. 



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



11. STRASBURGER, E., Versuche mit diocischen Pflanzen in Riicksicht auf Ge- 

 schlechtsverteilung. Biol. Centralbl. 20:657-665, 689-698, 721-731, 753- 

 785. 1900. 



12. WILSON, E. B., Recent researches on the determination and heredity of sex. 

 Science N. S. 29:53-70. 1909. 



