1 lx)go^s ones rem ained : separate, ' atid theo witacleus itself :apperai?s 



^ita/lje.^ diploid;- : '■ ./r:^ :^1 F;::,r'-.> ?d cr ■/■;;-':•■■: -^ ^ - - . ^ '^ 



'^r In tire later telbpHase of thfe homot^rpe divisibri 10 cbrotno- 

 rsoihes were again clearly obsef'ved 'in * White flint ' (Figs. 

 c32,r33').^ •■ :•:•,■ '" '■ \^>::.ry^ ' • - ; F " '„ . - 



j General Conclusion, 



The numbers ofgemine in the different races of ^ea which I 

 conld ascertain are as follows: — 



Red starch corn 9-10 



Yellow starch corn 10 



* Amber rice pop corn ' 10 



' Black starch ' 10 



* Golden broach field corn ' 10 



'White flint' 10 



' Sugar corn ' ..12 



'Early eight sugar corn '.... .....9, 12 



Red sugar corn 9—10 



Thus the number of gemini in Zea fluctuates from 9 to 

 12. The sugar corns show the tendency to exhibit a larger 

 number than the starch corns. Now it is an important question 

 how this difference of numbers of gemini in starch corns and 

 sugar corns arose. 



The genus Zea has but one species in which almost 

 innumerable forms and variations are contained. The plant in 

 wild condition is unknown, so that the original form of the 

 species can not be determined. Euchlaena mexicana which 

 grows extensively in Mexico is considered by some botanists as 

 the original form of Zea Mays, but generally we are used to 

 adopt a view that Zea Mays is a composite species, and hence 

 no single form can be taken as the original form of the entire 

 species. The types of variations usually classified are six in 

 number, i.e. the pod corns, the pop corns, the flint corns, the 

 dent corns, the soft corns, and the sugar corns. 



Thus the variation of the number of geoiini among 

 different types in Zea may seem to be favourable to the view 

 of the composite species of ^ea. But when we remember on 



