occurrence, [44]

Actinotrocha larva, [458]

Actinurus, [201], [222]

Acyclus, [221]

Adaptation, of Trematodes, [52], [62];

of Cestodes, [74];

of Nematodes, [161]

Adherent, [523]

Adineta, [204], [222], [227]

Adventitious avicularia, [482]