Trabeculae, traversing ampullae of tube-feet of Echinus esculentus, [517];

traversing coelom of Echinarachnius parma, [545];

traversing coelom of Antedon rosacea, [585]

Tracheae of Chondrophoridae, [309]

Trachelius, [137], [152] n.;

T. ovum, [153];

endosarc of, [144]

Trachelomonas, [110], [112];

galvanotaxy of, [22]

Trachomedusae, [288] f.