[Footnote 122: Mauritius: an island in the Indian Ocean; Huxley visited the island when on the voyage with the Rattlesnake. He wrote to his mother of his visit: "This island is, you know, the scene of Saint Pierre's beautiful story of Paul and Virginia, over which I suppose most people have sentimentalized at one time or another of their lives. Until we reached here I did not know that the tale was like the lady's improver--a fiction founded on fact, and that Paul and Virginia were at one time flesh and blood, and that their veritable dust was buried at Pamplemousses in a spot considered as one of the lions of the place, and visited as classic ground."] [Footnote 123: Mr. Darwin's coral reefs: The Structure and Distribution of Coral Reefs, published in 1848.] [Footnote 124: Professor Jukes (1811-1869): an English geologist.] [Footnote 125: Mr. Dana (1813-1895): a well-known American geologist and mineralogist; a professor at Yale from 1845. He wrote a number of books among which is Coral and Coral Reefs.] [Footnote 126: Jurassic period: that part of the geological series which is older than the Cretaceous and newer than the Triassic; so called from the predominance of rocks of this age in the Jura Mountains. The three great divisions of fossiliferous rocks are called the Triassic, the Jurassic, and the Cretaceous.] REFERENCE BOOKS The following reference books are suggested for a more complete treatment of various points in the text:--Andrews' History of England. Green's Short History of the English People. Traill's Social England. Roger's A Student's History of Philosophy. Royce's The Spirit of Modern Philosophy. Huxley's Life and Letters. Smalley's Mr. Huxley, in Scribner's Magazine for October, 1905. Darwin's Life and Letters. End of the Project Gutenberg EBook of Autobiography and Selected Essays, by Thomas Henry Huxley