Animal Life and Intelligence

action æsthetic Animal Intelligence animals antennæ appetence associated auditory beauty bees birds body body-cells called carbonic acid changes characters colour complex conceptual cones consciousness constructs Darwin developed differentiation direct disuse divergence effects elimination embryo emotions example experience fact factor faculty favourable female fertilized gemmules germ germ-plasm germinal cells give rise habits heredity human hydra hypothesis individual inference influence inherited insects instinctive activities intelligence intercrossing isolation kinesis kinetic larvæ layer less male mating matter metakinetic metazoa millimetre mode modified muscles natural selection nerves neurosis normal object observations offspring organism origin ovum pain parent perception phenomena physiological pleasure probably produced Professor Weismann protoplasm protozoa question regard reproduction resemblance result retina Romanes seems seen semicircular canals sensations sense sexual sexual selection similar Sir John Lubbock smell species sperms stimulation structure suppose surface taste tendency tion tissues variations vibrations