Anuraeidae, [201], [205], [225], [226]

A'oon, an edible worm, [297]

Apel, on Priapuloidea, [433]

Aperture, of zooecium, [468], [517], [523], [524]

Aphaneura, [353], [374]

Aphanostoma, [49]

Aphanostomatidae, [49]

Aphelenchus, [131], [155], [157]

Aphrodite, [312];

shape, [258];