Tubificidae, [350], [361], [366], [378]
Tubulipora, [518], [531], [532]
Turbellaria, [3] f.
Turtles, parasites of, [142]
Tylenchus, [131], [154], [155], [157], [160], [163]
Tylosoma, [422], [423], [426], [430], [447]
Typhloscolecidae, [258], [291], [321];
nuchal organ, [273] n.
Typhloscolex, [321]
Typosyllis, regeneration of head, [283] n.