Barbs, [2], [3];

absence of, [3]

Barbules, [2], [3]

Bargander, [128]

Barrel of feathers, or quill, [3]

Barrère, on Trochilus, [426]

Barrett-Hamilton, on Sterna longipennis, [313] n.

Bartlett, A. D., on Catheturus, [192] n.;

on Flamingo ejecting blood-like liquid, [86] n.;

on Hornbill, [392] n.;