——, South, no modern formations on west coast, [290].
Ammonites, sudden extinction of, [321].
Anagallis, sterility of, [247].
Analogy of variations, [159].
Ancylus, [386].
Animals, not domesticated from being variable, [17].
——, domestic, descended from several stocks, [19].
————, acclimatisation of, [141].
—— of Australia, [116].
—— with thicker fur in cold climates, [133].