Amoebophrya, [86], [159], [161]

Amoebula, [31], [51];

of Myxomycetes, [91], [92];

of Didymium, [92];

of fever parasites, [104]

Amphiaster (an aster in which the actines form a whorl at each extremity of the axis, which is straight), [222]

Amphibia, hosts of Opalinidae, [111], [123]

Amphiblastula, [226]

Amphicaryoninae, [306]

Amphidisc, [176], [177] f., [202]