Sulculus, [369]
Sulcus, [369]
Supero-marginal ossicle of Asteroidea, [436]
Supplemental skeleton of Foraminifera, [63], [66]
Surface, protoplasmic movements in relation to a, [20]—see Thigmotaxy, Stereotaxy;
ratio of mass to, [14], [23] f.;
-tension in relation to protoplasmic movements, [17];
to penetration of ovum by sperm, [34]
Surra disease, [119]
Swarmers of Foraminifera, [67] f.;