Actinistia, [477] n.

Actinopterygii, [476]

Actinotrocha, [28] f., [29]

Acysis, [588]

Adipose fins, [163]

Aegaeonichthys, [719]

Aelurichthys, [588]

Aethalion, [546]

Aetheolepis, [498];

scales, [187]