Rhopilema, [325];
R. esculenta, [312];
R. verrucosa, [312]
Rhumbler, on Foraminifera, classification, [58] n.;
shell, [66] f.;
monstrous shells, [69] n.
Rhyncheta, [159] f., [160], [162]
Rhythm, of cell-life and reproduction, [30] f.;
of contractile vacuoles in Paramecium, [143] n.;
in life-cycle of Infusoria, [148] n.