Prairie, Chicken, [234];

-Hen, [235];

Lesser Prairie-Hen, [235]

Pratincola, [510], [515];

P. rubetra, [511]

Pratincole, [268], [293] f.

Pre-Tertiary Birds, [2]

Presphenoid, [11]

Primaries, [20], [22]

Principal shaft, or rhachis of feather, [3]