Faroe Islands, pigeons of the, i. 183.

Fashion, influence of, in breeding, ii. [240].

Fastigate trees, ii. [277], [348].

Faunas, geographical differences, of, i. 10.

"Favourite" bull, ii. [65], [118].

Feathers, homologous variation in, ii. [325].

Feet, of pigeons, individual differences of, i. 160;

correlations of external characters in, i. 170-171.

Feet and beak, correlation of, in pigeons, i. 171-174.

Felidæ, fertility of, in captivity, ii. [150].