1915] YASUI—DIOSPYROS KAKI 373 
8. The 2x number of chromosomes is 56 or 54. 
I desire to express my thanks to Professor JOHN M. CouLter, 
under whose direction the investigation was undertaken; to 
Professor C. J. CHAMBERLAIN, who gave much advice; and to Mr. 
Y. Kumacatr and Professor Y. YABE, who assisted in securing 
material. 
UNIVERSITY OF CHICAGO 
