Aphroditidae, [258], [309];

frontal ridge, [260];

parapodium, [264];

elytra, [266], [309];

chaetae, [266]

Apical plate, of Trochosphere, [245]

Apodina, [235]

Apodoides, [225]

Apogon, Scolex polymorphus in, [77]

Apsilidae, [201], [203], [214], [220], [221]