P. pulvillus, [464]
Poraniidae, [464]
Porcellanaster, [471];
P. pacificus, [459];
P. caeruleus, [470]
Porcellanasteridae, [455], [459], [470]
Porcellanous Foraminifera, [58], [59], [62]
Pore(s), in test of Foraminifera, [64];
in central capsule of Radiolaria, [76];