THE ASSORTMENT OF CHEOMOSOMES 

 IN TRIPLOID DATURAS 



JOHK BELLING AND ALBEET F. BLAKESLEE 

 Station for Experimental Evolution, Cold Spring Harbor, 

 Long Island, New York 



The present article is the one of a nuniber of proposed 

 papers which will deal with the behavior of the chromo- 

 somes in the different classes of Datura mutants, the 

 correlation of the chromosomal differences with changes 

 in structural and other characters, and with the ratios 

 in which Mendelian allelomorphs are found in the off- 

 spring. The method mainly used in the microscopical 

 examination, and the general principles involved, are 

 given in two papers already in press for The Americax 

 Naturalist. 



Sizes of Chromosomes. — The diploid Datura Stra- 



339 



