British species, [42]

Planarians, [3], [7];

Dinophilus, compared with, [242], [243]

Planariidae, [42]

Planctoplana, [19]

Plankton, Rotifers in, [225]

Planocera, [18], [19], [20]

Planoceridae, [19], [23]

Planorbis, host of Gordius, [173]

Plants, parasites on, [154], [155], [157], [160]