Albumen, of egg, 60.
Alligators, a diverging branch of lizard, 45.
Amoeba, 21, 51, 69;
comparative study of, 203, 205, 231, 247, 251, 254, 257, 258, 259, 265,
266.
Amphibia, frogs, salamanders, a lower class, 45, 62; order of evolution of, 63; evolved from fishes, 64; most primitive backboned animals, 92; 94, 157; embryos of, 171; 200.
Anatomy, of mind, 202.
Ant-bears, 42.
Anthropoidea, 160.
Anthropology, 177; methods and results of, 186; types of, 186, 187; comparative, of mind, 211.
Anthropometry, 177.
Ants, communities of, 125;
mental life of, 207, 208;
organizations of, 260, 263, 264.