Naturalist, born at Kingston, Canada; took an honours degree in science at Cambridge; came under the influence of Darwin, whose theory of evolution he advocated and developed in lectures and various works, e. g . "Scientific Evidences of Organic Evolution," "Mental Evolution in Animals," "Mental Evolution in Man"; his posthumous "Thoughts on Religion" reveal a marked advance from his early agnosticism towards a belief in Christianity; founded the Romanes Lectures at Oxford (1848-1894).