George John Romanes FRS (1848-1894), who also wrote as Physicus, was a Canadian-born English evolutionary biologist and physiologist who laid the foundation of what he called comparative psychology, postulating a similarity of cognitive processes and mechanisms between humans and animals. Romanes was the youngest of Charles Darwin's academic friends, and his views on evolution are historically important. He invented the term neo-Darwinism, which is still often used today to indicate an updated form of Darwinism. Guided by Michael Foster, Romanes continued to work on the physiology of invertebrates at University College London under William Sharpey and Burdon- Sanderson (1874). At 31 (1879), he was elected a Fellow of the Royal Society on the basis of work on the nervous systems of 'medusae'. However, Romanes' tendency to support his claims by anecdotal evidence (rather than empirical tests) prompted Lloyd Morgan's warning known as Morgan's Canon. His works include: The Scientific Evidences of Organic Evolution (1882), Mental Evolution in Man (1888), Aristotle As a Naturalist (1891) and Mind and Motion and Monism (1895).