Paraseison, [212], [225], [226]

Parasitic, Turbellaria, [51];

Polyclads, [22];

Triclads, [32];

Rhabdocoela, [45], [51];

Nemertinea, [101], [119];

Rotifers, [204], [227];

Polychaeta, [297];

Leeches, [406]

Parasitism, effect on the parasite, [161], [177];