Newts.
Nicholson, Dr., on the non-immunity of dark Europeans from yellow
fever.
Nictitating membrane.
Nidification of fishes; relation of, to colour; of British birds.
Night-heron, cries of the.
Nightingale, arrival of the male before the female; object of the song
of the.
Nightingales, new mates found by.
Nightjar, selection of a mate by the female; Australian, sexes of;
coloration of the.
Nightjars, noise made by some male, with their wings; elongated
feathers in.
Nilghau, sexual differences of colour in the.
Nilsson, Prof., on the resemblance of stone arrow-heads from various
places; on the development of the horns of the reindeer.
Nipples, absence of, in Monotremata.
Nitsche, Dr., ear of foetal orang.
Nitzsch, C.L., on the down of birds.
Noctuae, brightly-coloured beneath.
Noctuidae, coloration of.
Nomadic habits, unfavourable to human progress.
Nordmann, A., on Tetrao urogalloides.
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