colouring of the kite tumbler, i. 160;
crossing of the pigeon with Columba œnas, i. 193;
mongrels of the trumpeter pigeon, ii. [66];
close interbreeding of pigeons, ii. [126];
opinion on Aldrovandi's fowls, i. 247;
on stripes in chickens, i. 249-250;
on the combs of fowls, i. 253;
double-spurred Dorking fowls, i. 255;
effect of crossing on colour of plumage in fowls, i. 258;
incubatory instinct of mongrels between non-sitting varieties of fowls, ii. [44];