Trochophore, [229]

Trochopus, [73]

Trochosphaera, [200], [201], [221], [229], [230]

Trochosphaeridae, [221]

Trochosphere, of Archiannelida, [243], [245];

of Polychaeta, [274], [275], [510], [512];

of Echiuroidea, [439], [510];

of Polyzoa, [510]

Trochus, in Rotifers, [202], [204]

Trophi, of Rotifers, [209], [210]