reversion of mongrel, to coloration of, C. livia, i. 197-202;

history of the cultivation of, i. 205-207;

history of the principal races of, i. 207-212;

mode of production of races of, i. 212-224;

reversion in, ii. [29], [47];

by age, ii. [38];

produced by crossing in, ii. [40], [48];

prepotency of transmission of character in breeds of, ii. [66]-[67];

sexual differences in some varieties of, ii. [74];

period of perfect plumage in, ii. [77];