of Microdrili, [375] f.;

of Megadrili, [381] f.;

of Lumbricidae, [389], [390];

of Leeches, [395], [396];

(= hooks), of Echiuroid Gephyrea, [434], [435], [438], [440] f., [446]

Chaetifera, [445], [446]

Chaetobranchus, [352]

Chaetogaster, [356], [377], [401]

Chaetognatha, [186] f., [534];

anatomy, [186];