of Oligochaeta, [355];

of Leeches, [397];

of Gephyrea, [416];

of Phoronis, [454], [462];

of Polyzoa, [468], [488], [495]

Body-wall, of Nemertinea, [102], [103];

of Nematodes, [125];

of Gordiidae, [165];

of Acanthocephala, [175];

of Chaetognatha, [187];