Monas, [111], [119];

M. dallingeri, gametes of, [116] n.

Monaxon, [183], [184], [232]

Monaxonic (= symmetrical about one single axis), [76]

Monaxonida, [211], [216] f.

Moniliform meganucleus of Stentor, [156]

Monobrachiidae, [274]

Monobrachium, [274]

Monocaulus, [263], [273];

M. imperator, [269], [273]