Aralia trifoliata, bud-variation in leaves of, i. 382.
Araucarias, young, variable resistance of, to frost, ii. [309].
Archangel pigeon, ii. [240].
Arctic regions, variability of plants and shells of, ii. [256].
Aria vestita, grafted on thorns, i. 387.
Aristophanes, fowls mentioned by, i. 246.
Aristotle, on solid-hoofed pigs, i. 75;
domestic duck unknown to, i. 277;
on the assumption of male characters by old hens, ii. [51].
Arni, domestication of the, i. 82.