Spirosperma, [378];

chaeta, [350]

Spirulaea, [301]

Sporocysts, [92];

of Distomum macrostomum, [64], [65];

of D. hepaticum, [67];

hosts of, [71]

Staggers, induced by Coenurus, [82]

Statoblast, [493], [499], [501] f., [506];

sessile, [502];