light-organs, [294]

Alciopina parasitica, [298]

Alcyonella, [494], [505], [518]

Alcyonellea, [518]

Alcyonidium, [477], [480], [492], [518], [532];

structure of zooecium, [469];

reproduction, [507], [508];

larva, [510], [511]

Alimentary canal—see Digestive System

Alitta, [317]