in Oikomonas, [112];
in Choanoflagellates, [122]
Inner perihaemal ring-canal, of Asterias rubens, [448];
development of, in Asterina gibbosa, [612]
Inoculation of malarial fever in man through a mosquito, [105] f.
Insectivorous plants, [38]
Insects, metamorphoses of, [44];
as hosts of Trichonymphidae, [123]
Interambulacral area, of Echinarachnius parma, [544];
of Echinocardium cordatum, [550]