development, in Antedon rosacea, [619] f.
Radiolaria, [49], [50], [75] f.;
streaming of granules, [17];
brood-formation, [33], [85] f.;
regeneration, [35];
animal nutrition of, [40];
relations of, [49];
freshwater (= Heliozoa), [71];
shells and skeletons of, [77], [78], [80], [82] f., [84], [85];
symbiosis of Diatoms and yellow cells (= Zooxanthella) in, [82], [86] f., [125];