JULY. 1911.] KU WADA.—MAWSIS IN THE P. M. C. OF ZEA MAYS L. \ 79 



Philipp," which had the red starch kernels. Thus the red color 

 of the newh raised kernels has been with a great probability 

 derived through the pollen of the *' King Philipp." The next 

 year he got about 10 plants from the kernels of this red sugar 

 corn^ of which only two or three were the red sugar corn and 

 all the others the plants of the yellow race. In continuing 

 the experiments he got in the next generation of the red sugar 

 corn the reciprocal proportion between the red and the yellow. 

 Since then no separation of the color has taken place and only 

 the red sugar corn has been obtained. 



This account is so far not in discordance with the view 

 stated before, that the original number of gemini in all races of 

 Zea would have been 12. The repetition of Dr. Nakai's in- 

 teresting experiment with the exact numerical relation and 

 behavior of chromosomes and their fate during the course of 

 breeding in view is intended. 



LITERATURE. 



1. Gates R. R., The stature and chromosomes of Oenothera 



gigas, De Vries. Arch. f. Zellforsch. Bd. 3. 1909. 



2. KuwADA, Y., A cytological study of Oryza sativa L. Bot. 



Mag. Tokyo. Vol. XXIV. 1910. 



3. MiYAKE, K., liber Reduktionstheilung in den PoUenmutter- 



zellen einiger Monokotylen. Jahrb. f. Wiss. Bot. Bd. 42. 

 1905. 



4. Rosenberg, 0., Cytological studies on the apogamy in 



Hieracium. Botanisk Tidsskrift. Bd. 28. 1908. 



5. , Uber die Chromosomenzahlen bei Taraxacum und 



Rosa. Svensk Botanisk Tidskrift. Bd. 3. 1909. 



6- Shibata, K. u. Miyake, K., Uber Parthenogenesis bei Hout- 

 tuynia cordata (in German and Japanese). Bot. Mag. Tokyo. 

 Vol. XXII. 1908. 



7. Strasburger, E., Typische und allotypischc Kerntheilung. 

 Jahrb. f wiss. Bot. Bd. 42. 1905. 



