_Loc. cit._ p. 116. Footnote 51: _Loc. cit._ p. 111. Footnote 52: _Loc. cit._ p. 126. Footnote 53: _Loc. cit._ p. 126. Footnote 54: _Loc. cit._ p. 127. Footnote 55: _Loc. cit._ p. 139. Footnote 56: “Archives de Zoologie expérimentale,” 1885. Footnote 57: “Studien über Entwickelungsgeschichte der Thiere,” 1898–1902. Footnote 58: A summary of this question is to be found in a new volume by M. Alsberg, “Die Abstammung des Menschen,” chap. iii., 1902. Footnote 59: Uhlenhuth, “Deutsche Medicin. Wochenschrift,” p. 82, 1901. Footnote 60: Wassermann and Schuetze, “Berliner klinische Wochenschrift,” p. 7, 1901. Footnote 61: The _Lancet_, Jan, 18, 1902. Footnote 62: Selenka, _loc. cit._ p. 157. Footnote 63: Deniker, _loc. cit._ p. 17. Footnote 64: “Die Mutationstheorie,” vol. I., Leipzig, 1901. Footnote 65: “Comptes Rendus de l’Académie des Sciences,” 1892, pp. 275, 1329; “Revue scientifique,” 1880, p. 1124. Footnote 66: “Der Bau des Menschen,” Third Edition, 1902. Footnote 67: Selenka, “Studien über Entwicklungsgesch. d. Thiere,” p. 89. Footnote 68: “Dictionnaire encyclopédique des Sciences Medicales,” article “Dent,” by Magitot, p. 194, 1882. Footnote 69: Schmid, “Vierteljahrschrift für Zahnheilkunde,” p. 141, 1896. Footnote 70: Schmid, _loc. cit._ p. 147. Footnote 71: Redier, in “Revue mensuelle de Stomatologie,” p. 164, 1895. Footnote 72: “Comptes Rendus de la Société de Stomatologie de Paris,” vol. I., p. 98, 1890. Footnote 73: _Loc. cit._ p. 204. Footnote 74: Virchow’s “Archiv für Pathologische Anatomie,” 1893, vol. CXXXII., p. 76. Footnote 75: Lannelongue, in the “Bulletin médical,” p. 621, 1902. Footnote 76: Treves, “The Surgical Treatment of Perityphlitis,” London 1895. Footnote 77: _Edinburgh Medical Journal_, August 1893. Footnote 78: “Archiv für klinische Chirurgie,” vol. XLVIII., p. 715, 1894. Footnote 79: “Münchener medicinische Wochenschrift,” 1898. Footnote 80: “Archiv für klinische Chirurgie,” vol. XLVIII., p. 136, 1894. Footnote 81: This topic is discussed at length in my lecture, published in the _Memoirs and Proceedings of the Manchester Literary and Philosophical Society_, 1901, vol. XLV., note 5. Footnote 82: “Archives de Médicine navale,” 1887. Footnote 83: Ewald, “Klinik des Verdauungskrankheiten,” vol. III., p. 267, 1902. Footnote 84: Stillmarck, in “Arbeiten des pharmacologischen Institutes zu Dorpat,” vol. III., p. 110, 1889. Footnote 85: The case is quoted in Pozzi’s “Traité de Gynécologie,” p. 714, 1890. Footnote 86: Crisp, “Proceedings of the Zoological Society of London,” p. 48, 1865. Footnote 87: Lenhossek, in Virchow’s “Archiv. für pathologische Anatomie,” vol. XL., p. 1. Footnote 88: “Abhandlungen der mathem.-physikal. Classe d. K. Bayerisch. Akad. d. Wissensch. München,” vol. XIII., Part II., p. 268, 1880. Footnote 89: _Loc. cit._ p. 245.