from, i. 91;
feral cattle in, i. 85;
food-plants of savages of, i. 307-309;
South, diversity of breeds of cattle in, i. 80;
West, change in fleece of sheep in, i. 98.
_Agave vivipara_, seeding of, in poor soil, ii. 169.
AGE, changes in trees, dependent on, i. 387.
AGOUTI, fertility of, in captivity, ii. 152.
AGRICULTURE, antiquity of, ii. 243.
_Agrostis_, seeds of, used as food, i. 309.
AGUARA, i. 26.
AINSWORTH, Mr., on the change in the hair of animals at Angora, ii. 278.
AKBAR Khan, his fondness for pigeons, i. 205; ii. 204.
_Alauda arvensis_, ii. 154.
ALBIN, on "Golden Hamburgh" fowls, i. 247;
figure of the hook-billed duck, i. 277.
ALBINISM, i. 111, ii. 17.
ALBINO, negro, attacked by insects, ii. 229.
ALBINOES, heredity of, ii. 9.
ALBINUS, thickness of the epidermis on the palms of the hands in man, ii.
297.
ALCO, i. 31, ii. 102.
ALDROVANDI, on rabbits, i. 104;
description of the nun pigeon, i. 156;
on the fondness of the Dutch for pigeons in the seventeenth century, i.
205;
notice of several varieties of pigeons, i. 207-210;
on the breeds of fowls, i. 247;
on the origin of the domestic duck, i. 278.
ALEFIELD, Dr., on the varieties of peas and their specific unity, i. 326;
on the varieties of beans, i. 330.
ALEXANDER the Great, his selection of Indian cattle, ii. 202.
ALGAE, retrogressive metamorphosis in, ii. 361;
division of zoospores of, ii. 378.
ALLEN, W., on feral fowls, i. 237; ii. 33.
ALLMAN, Professor, on a monstrous _Saxifraga geum_, ii. 166;
on the development of the Hydroida, ii. 368.
ALMOND, i. 337;
antiquity of, ii. 429;
bitter, not eaten by mice, ii. 232.
_Alnus glutinosa_ and _incana_, hybrids of, ii. 130.
ALPACA, selection of, ii. 208.
_Althaea rosea_, i. 378, ii. 107.
_Amaryllis_, ii. 139.
_Amaryllis vittata_, effect of foreign pollen on, i. 400.
AMAUROSIS, hereditary, ii. 9.
AMERICA, limits within which no useful plants have been furnished by, i.
310;
colours of feral horses in, i. 60-61;
North, native cultivated plants of, i. 312;
skin of feral pig from, i. 77;
South, variations in cattle of, i. 88, 92.
_Amygdalus persica_, i. 336-344, 374.
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AMMON, on the persistency of colour in horses, ii. 21.
_Anagallis arvensis_, ii. 190.
ANALOGOUS variation, i. 409, ii. 348-352;
in horses, i. 55;
in the horse and