Chapter 38

by tubers in the dahlia, i. 385; on the deafness of white cats with blue eyes, ii. 329. BREEDING, high, dependent on inheritance, ii. 3-4. BREEDS, domestic, persistency of, ii. 246, 428-429; artificial and natural, ii. 413-414; extinction of, ii. 425; of domestic cats, i. 45-47; of pigs produced by crossing, i. 78; of cattle, i. 86-87, 91-93; of goats, i. 101. BREHM, on _Columba amaliæ_, i. 183. BRENT, B. P., number of mammæ in rabbits, i. 106; habits of the tumbler pigeon, i. 151; Laugher pigeon, i. 155; colouring of the kite tumbler, i. 160; crossing of the pigeon with _Columba oenas_, 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,