912 REPORT OF THE CONFERENCE ON GENETICS, 
from the green variegated cross were much the same as the last- 
mentioned, but several had white feathers in the tails and wings, and 
yellow towards the extremity of the belly. Those from the yellow cross 
were green variegated, and half, or rather less, had the yellow plumage of 
the variety. 
The yellow colour in canaries has been known and bred for something 
like 850 years. In its hereditary characteristics it seems therefore to 
have acquired such force as that even when crossed with the wild type it 
is incapable of being suppresséd, and can impress its likeness on a con- 
siderable portion of the offspring. This seems to lend proof to my view 
that Mendel’s law is only applicable to cases of crossing between the 
original type and such varieties which either have been in existence for 
a short time only, or are not yet pure bred, or are albinos. 
