P. F. FYSON. 27 
unit characters do, are of varying power, so that when combined 
in the hybrid, the dominance of the one (naked) is not always 
complete. This sort of thing occurs for instance (according to 
Shull) (13) in the branching of the sunflower. 
Other characters also appeared to segregate, but their be- 
haviour could not be followed after the second hybrid generation, 
on account of the failure of the third. But as far as the two 
generations showed, length and fineness of lint were dominant 
over the short and rough woolly nature, and the habit of the bolls 
opening widely as in fig. 16 and allowing the seeds to hang down 
freely (and so be collected cleanly) dominant over that of opening 
only a little. 
If this be so, these important characters like the others 
of which this has been shown, could be bred into our Indian 
races of cotton plants without much difficulty. 
