of Haemosporidae, [102] f.;
of Sarcocystis tenella, [108] n.;
of Volvocaceae, [128] f.;
of Eudorina, [129];
of Peritrichaceae, [151] f.
Sex, ternary, of Pandorina, [128] f.
Sexual fusion of Halteridium, [103], [105]
Sheath, tentacular, of Suctoria, [159]
Sheep, host of Sarcocystis tenella, [108] n.
Shell, of Diatomaceae, [84];