Trichonympha, [111]

Trichonymphidae, [111], [123] f.;

flagella, [114]

Trichosphaerium, [51], [53] f.;

test, [53];

life-cycle, [54], [56]

Trichostemma, [216]

Trichostomata, [137]

Tridactyle pedicellariae, of Echinus esculentus, [506], [507];

of E. acutus, [509];