No. 518] COLOE INHERITANCE 91 



the mixture of the ratios 3:1, 1:1, 3:5 and 1 : 3, all of 

 which are expected Mendelian results, on the basis of 

 present knowledge of the compound character of Lychnis 

 colors. 



Crosses between white-flowered plants should, not in- 

 frequently, result in progenies of all purple-flowered off- 

 spring or of purple and white in the ratios 1:1, 3:5, or 

 1:3. These results have not yet been found, owing no 

 doubt to the fact that my crosses between white and 

 white have been almost invariably made between sibs in 

 wholly white-flowered families. 



STATION FOR EXPERIMENTAL EVOLUTION, 

 COLD SPRING HARBOR, LONG ISLAND, 

 November 19, 1909. 



LITERATURE CITED 



1909. Bateson, W. Mendel's Principles of Heredity, pp. xiv + 396, 1909. 



Cambridge, University Press. 

 1902. Bateson, W., and Saunders, E. R. Experimental Studies in the 



Physiology of Heredity, I. Reports to the Evolution Committee 



of the Royal Society. 



1905. Bateson, W., Saunders, E. R., and Punnett, R. C. Reports to the 



Evolution Committee of the Royal Society, II. 



1906. Bateson, W., Saunders, E. R., and Punnett, R. C. Ibid., III. 

 1908. Baur, E. Einige Ergebnisse der experimentellen Vererbungslehre. 



Beih. z. Med. Klinik., 4: 265-292, 1909. 



1908. Shull, G. H. Some New Cases of Mendelian Inheritance. Bot. Gaz., 



45: 103-116, February, 1908. 



1909. Shull, G. H. The "Presence and Absence " Hypothesis. Amer. 



Nat., 43: 410-419, July, 1909. 

 1901. Tschermak, E. Weitere Beitrage iiber Verschiedenwertigkeit der 



Merkmale bei Kreuzung von Erbsen und Bohnen. Ber. Deutsch. 



Bot. Gesell., 19: Heft 2, 1901. 

 1904. Tschermak, E. Weitere Kreuzungsstudien an Erbsen, Levkojen und 



Bohnen. Zeitschr. f. d. landw. Versuchsw. in Oesterr., 1904. 



1907. Wheldale, Miss M. On the Inheritance of Flower-color in Antir- 



rhinum majus. Proc. Roy. Soc., 79: 1907. 



1909. Wheldale, Miss M. On the Nature of Anthocyanin. Proc. Cam- 

 bridge Phil Soc., 15 (pt. II.) : 137-168, 1909. 



