Experiments with Poultry 125 
sive) normal feet, which gave 11 individuals with and 1 3 without 
extra toes. A similar experiment with the hen (F,) gave analo- 
gous results. Evidently in this case a character usually domi- 
nant has become recessive. It is clear that unless great pre- 
cautions are taken, such cases might easily be put down, in other 
experiments, amongst the recessives. 
The shank feathering of the Cochin dominates over the clear 
shank of the Leghorn, Houdan, and Hamburg, but the dominance 
is always incomplete. When the F,’s were bred together, they 
produced a large number of F, with feathered shanks, and a few 
recessive clear shanks in the proportion of 28.7:1. The Mende- 
lian expectation is 3:1. In other combinations the expectation 
is much more nearly realized. Hurst concludes that ‘‘the Men- 
delian principles are at work in these aberrant phenomena, but 
are masked by something not yet perceived.” 
Hurst’s general conclusions are as follows: Dominant char- 
acters are rose comb, white plumage, extra toes, feathered shanks, 
