Chapter XVI
General: Romanes, Darwin and After Darwin, 1892, vol. I, chaps. I-V; Same author, The Scientific Evidences of Organic Evolution; Weismann, Introduction to the Evolution Theory, 1904; Osborn, Alte und Neue Probleme der Phylogenese, Ergebnisse der Anat. u. Entwickel., vol. III, 1893; Ziegler, Ueber den derzeitigen Stand der Descendenzlehre in der Zoologie, 1902; Jordan and Kellogg, Evolution and Animal Life, 1907, chaps. I and XIV. Evolutionary Series—Shells: Romanes, loc. cit.; Hyatt, Transformations of Planorbis at Steinheim, Proc. Am. Ass. Adv. Sci., vol. 29, 1880. Horse: Lucas, The Ancestry of the Horse, McClure’s Mag., Oct., 1900; Huxley, Three Lectures on Evolution, in Amer. Addresses. Embryology—Recapitulation Theory: Marshall, Biolog. Lectures and Addresses, 1897; Vertebrate Embryology, 1892; Haeckel, Evolution of Man, 1892. Primitive Man: Osborn, Discovery of a Supposed Primitive Race of Men in Nebraska, Century Mag., Jan., 1907; Haeckel, The Last Link, 1898. Huxley, Man’s Place in Nature, collected essays, 1900; published in many forms. Romanes, Mental Evolution in Man and Animals.