—see also Brood-division

Murbach, [248] n., [288]

Muricea, [356]

Muriceidae, [330], [355]

Muscle of Vorticella, [157]

Muscle-cell, [19]

Muscular contraction, physical explanation of, [19]

—see also Myonemes

Mussa, [401]

Mycetozoa (= Myxomycetes, q.v.), [50], [90] f.;