of Polychaeta, [269]
Phascolion, [423], [425], [428]
Phascolosoma, [416], [420], [423], [425], [428], [447];
as host of Loxosoma, [489]
Philippi, on Hirudinea, [406]
Philodina, [208], [222], [227]
Philodinidae, [222]
Phoronis, [450] f., [451], [452], [453], [455];
habits, [451];