2. RUDOLF VIRCHOW, “Die physischen Eigenschaften der Lappen” (_Verhandlungen der Berliner Gesellschaft für Anthropologie, Ethnologie u. Urgeschichte_, vol. vii [1875], pp. 34 _et seq._; also vol. xxii [1890], p. 411). Page 118. 1. W. H. R. RIVERS, “Observations on the Senses of the Todas” (_Journal of Psychology_, vol. i [1905], pp. 322 _et seq._). 2. The complete results of this study have not been published. The tests on hearing were published by FRANK G. BRUNER, The Hearing of Primitive Peoples (New York, _Science Press_, 1908). Page 120. CHARLES DARWIN, Journal of Researches into the Natural History and Geology of the Countries visited during the Voyage of H. M. S. _Beagle_ round the World (New York, 1895), pp. 228-229. Page 121. A brief résumé of FREUD’S theory will be found in the _American Journal of Psychology_, vol. xxi (1910). Page 126. 1. For a history of these attempts, see P. TOPINARD, Éléments d’Anthropologie générale (Paris, 1885), pp. 1-147. 2. H. HUXLEY, “On the Geographical Distribution of the Chief Modifications of Mankind” (_Journal of the Ethnological Society_, N. S., vol. ii [1870], pp. 404-412). Page 127. FRIEDRICH MÜLLER, Allgemeine Ethnographie (Vienna, 1879). Page 128. W. Z. RIPLEY, The Races of Europe (New York, 1899); J. DENIKER, The Races of Man (London, 1900). Page 129. 1. F. SARASIN, Ergebnisse naturwissenschaftlicher Forschungen auf Ceylon (Wiesbaden, 1892-93), vol. iii, pp. 569 _et seq._ 2. E. BÄLZ, “Menschenrassen Ost-Asiens mit specieller Rücksicht auf Japan” (_Verhandlungen der Berliner anthropologischen Gesellschaft_, vol. xxxiii [1901], pp. 166-189); H. TEN KATE, “Anthropologisches und Verwandtes aus Japan” (_Internationales Centralblatt für Anthropologie_, vol. vii [1902], p. 659). 3. W. JOCHELSON, The Yukaghir and the Yukaghirized Tungus (_Publications of the Jesup North Pacific Expedition_, vol. ix [1910], p. 59). Page 131. 1. FRANZ BOAS, “A. J. Stone’s Measurements of Natives of the Northwest Territories” (_Bulletin of the American Museum of Natural History_, vol. xiv [New York, 1901], pp. 53-68); “Zur Anthropologie der nordamerikanischen Indianer” (_Verhandlungen der Berliner Gesellschaft für Anthropologie, Ethnologie und Urgeschichte_, vol. xxvii [1895], pp. 367 _et seq._). 2. PLINY EARLE GODDARD, Life and Culture of the Hupa (_University of California Publications, American Archæology and Ethnology_, vol. i [Berkeley, 1903-04]); WASHINGTON MATTHEWS, Navaho Legends (1897); P. A. G. MORICE, “The Great Déné Race” (_Anthropos_, vols. i, ii, iv [1906, 1907, 1909]). Page 132. A. L. KROEBER, Types of Indian Culture in California (_University of California Publications, American Archæology and Ethnology_, vol. ii [1904-07], pp. 81-103).