Fixing protoplasm, [15]
Flabellum, [375], [386], [398];
protandry of, [370]
Flagella, flagellum, [17] f., [47];
of Protozoa, [47];
formed by altered pseudopodia in Microgromia, [60];
of Heliozoa, [73];
of sperms of Coccidiidae, [102];
of Acystosporidae, [105];