70 SUidy of Right- and Left- Handedness 



(8) Nevertheless, it appears probable that the diverse ratios given 

 by odd and even rows in Maize result from a difference in shape of the 

 environment of the developing embryo, this being connected with the 

 different spatial relationship of the seeds on the cob. An alternative 

 hypothesis involving somatic segi-egation of symmetry characters repre- 

 sented in the gametes is dismissed as highly improbable. 



Botany School, CAMBRroGB, 

 November 1911. 



