Podaxonia, [461]

Polyarthra, [201], [224], [226]

Polybostrichus, [280]

Polycelis, [30], [31], [40], [42]

Polychaeta, [241], [245] f.;

classification, [257], [258], [303] f,;

head, [248], [259] f.;

parapodium, [246], [264] f.;

chaetae, [246], [266] f.;

coelomic fluid, [252];