taking the lead in science, [273], [274].
Insalivation of food, [352] (see [glands]).
‘Insects’, what they were, [43].
Insensibility produced by venom, [577], [590].
Institution, London, Lectures at (see [Huxley], [Ruskin]).
Integument; expansion of, [30];
modifications in, [315], [320], et seq.;
hood of co., [327];
sloughing, [329];
patterns and colouring, [338], et seq. (see [epidermis]).