by a fertilising tube in Chlamydomonas, [125];
of Volvocaceae, [127] f.;
of Volvox, [127] f.;
isogamous and endogamous, of Stephanosphaera, [128];
in Dinoflagellates, [131] n.;
of Noctiluca, [133];
of Ciliata, [148] f.;
of Paramecium caudatum, [148];
of Colpidium colpoda, diagram, [149];