of Chaetognatha, [189];

of Rotifers, [206], [226];

of Gastrotricha, [232], [234], [235];

of Polychaeta, [285];

of Oligochaeta, [366];

of Gephyrea, [426], [433], [442];

of Phoronis, [451]

Haemadipsa, [408];

eye, [394]

Haemal fluid, [252]