Felt, of Aphrodite, [268], [312]

Fertilisation, of Nemertinea, [117];

of Nematodes, [135];

of Gordiidae, [171];

of Acanthocephala, [179];

of Chaetognatha, [188];

of Rotifers, [217]

Filaria, [147], [163];

F. attenuata, [134];

F. cystica, [142];