ARCHANGEL pigeon.
ARCTIC regions, variability of plants and shells of.
Aria vestita, grafted on thorns.
ARISTOPHANES, fowls mentioned by.
ARISTOTLE, on solid-hoofed pigs. -domestic duck unknown to. -on the assumption of male characters by old hens.
ARNI, domestication of the.
ARNOLD, Mr., experiments of pollen on the maize.
ARRESTS of development.
ARTERIES, increase of anastomosing branches of, when tied.
ARU Islands, wild pig of.