Trichotrachelidae, [144]

Tricladida, [7], [30] f.;

habits, [35] f.;

sexual reproduction, [38];

asexual reproduction, [40];

classification, [42];

British species, [31], [32], [34], [42]

Tricoma cincta, [157]

Tricuspidaria, [91]

Trigaster, [359], [384]