70 Stiuly of Right- a)ul 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 segregation of symmetry characters repre- 

 sented in the gametes is dismissed as highly improbable. 



Botany School, Cambridge, 

 November 1911. 



