Oxalis, trimorphic species of, ii. [400].
Oxalis rosea, ii. [132].
Oxley, Mr., on the nutmeg tree, ii. [237].
Oysters, differences in the shells of, ii. [280].
Paca, sterility of the, in confinement, ii. [152].
Pacific islands, pigs of the, i. 70.
Padua, earliest known flower garden at, ii. [217].
Paduan fowl of Aldrovandi, i. 247.
Pæonia moutan, ii. [205].
Pæony, tree, ancient cultivation of, in China, ii. [205].