IN THE TROPICS : III. 



11 



Expt. 32. — The offspring of yellow grains from the excep- 

 tional cob recorded above as having shown equality of yellow 

 and white grains in Fj— also pollinated again from G. W. S — 

 were in no way distinguishable from the specimens last 

 described. The following numbers were obtained : — 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



Yellow. 



250 

 268 

 210 

 275 

 225 

 195 

 189 

 145 

 212 

 173 

 173 

 236 

 151 

 208 

 119 

 157 

 208 

 129 

 128 

 63 



Per cent. 

 Yellow. 



Per cent. 

 White. 



7 

 7 

 2 

 ti 

 7 

 8 

 2 

 5 

 5 

 

 3 

 8 

 

 5 

 7 

 4 

 9 

 8 

 8 

 4 



Total 3,714 



3,725 



7,459 



49-7 



50-3 



Expectation : 50 yellow ; 50 white. 

 3.— BLACK ALEURONE LAYER CROSSED WITH WHITE. 



(a). Black x White. 



Expt. 33. Black Mexican x Moore's Concord. 



The grains so produced were, all of a blue black tint, and 

 were not perceptibly paler in colour than those of the pure 

 black strain. 



(b). White x Black. 



Expt. 34. — Moore's Concord x Black Mexican. 

 The resulting grains were either black, intermediate, or pure 

 white, and a considerable number of the intermediate grains 



