Prionochilus, [570], [571];

P. squalidus, [571];

P. vincens, [570]

Prionodura, [551];

P. newtoniana, [548], [551]

Prionopinae, [531] f.

Prionops, [532]

Prionotelus, [441], [442];

P. temnurus, [443] f.

Prismatic, hues in feathers, cause of, [3];