Bronchi, [13]

Bronchial syrinx, [21]

Bronn's Thier-reich, [14], [23]

Brontornis, [45];

B. burmeisteri, [45]

Bronze-wing–see Pigeon

Brown colour in birds, its nature, [3] n.

Buarremon, [575], [576]

Bubo, [398]-[403];

fossil, [415];