246 



THE AMEBIC AN NATURALIST [Vol. LIII 



groups I and III. No linkage between the Ss endosperm 

 and Rr aleurone factors separate groups II and III. 



Since the number of known factor differences in maize 

 is already some three or four times the number of chro- 

 mosomes, more definite knowledge of the behavior of all 

 these factors in relation to each other will be awaited with 

 interest. Especially since maize is one of the best mate- 

 rials from the ])Iant side to which the chromosome hy- 

 pothesis, as worked out in Drosophila, can look for con- 

 tradiction or support. 



Oollins, G. N., and Kemi)ton, J. H. 



IStll. Tiiheritauce of Waxy Endosperm in Hybrids of Chinese Maize. 



1 V Conf . Tnternat. de Gi^n^tique, pp. 347-357. 

 Tin:;, inheritance of Waxy Endosperm in Hybrids with Sweet Corn. 



