Collinson, Peter, peach-tree producing a nectarine, i. 340.
Coloration, in pigeons, an evidence of unity of descent, i. 195-197.
Colour, correlation of, in dogs, i. 28-29;
persistence of, in horses, i. 50;
inheritance and diversity of, in horses, i. 55;
variations of, in the ass, i. 62-63;
of wild or feral cattle, i. 85;
transmission of, in rabbits, i. 107;
peculiarities of, in Himalayan rabbits, i. 111;