OIL-GLAND, absence of, in fantail pigeons.
OLDFIELD, Mr., estimation of European dogs among the natives of Australia.
OLEANDER, stock affected by grafting in the.
OLLIER, Dr., insertion of the periosteum of a dog beneath the skin of a rabbit.
Oncidium, reproduction of.
ONIONS, crossing of. -white, liable to the attacks of fungi and disease.
Ophrys apifera, self-fertilisation of. -formation of pollen by a petal in.
Opuntia leucotricha.
ORANGE. -crossing of. -with the lemon. -naturalisation of, in Italy. -variation of, in North Italy. -peculiar variety of. -bizzarria. -trifacial.
ORCHIDS, reproduction of.