H. cinerascens, [567];
H. fusco-rubra, [567];
H. aspera, [570];
H. intestinalis, [570];
H. tremula, [570]
Holothuroidea, [431], [537], [560] f., [583];
mesenchyme of larva, [604];
development of, [609], [614], [615];
phylogeny of, [622]
Holotrypasta (= Porulosa), [76]