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Bonizzi, P., difference of colour in sexes of pigeons. Bonnet monkey. Bonwick, J., extinction of Tasmanians. Boomerang. Boreus hyemalis, scarcity of the male. Bory St. Vincent, on the number of species of man; on the colours of Labrus pavo. Bos etruscus. Bos gaurus, horns of. Bos moschatus. Bos primigenius. Bos sondaicus, horns of, colours of.
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