nutrition of, [15] f., [35] f.;

-membrane of ovum of Sea-urchin, [7];

-wall, [3];

in Flagellates, [109], [113];

in Dinoflagellates, [130];

-boundary in Flagellates, [113];

-division, [24] f., [25], [27];

Spencerian division, [31] f.;

-unions in Volvox, [126], [127];

collar-, of Choanoflagellates, [121], [122];