Footnote 10: “Moral Philosophy,” London, 1755. Footnote 11: Buckle, “History of Civilisation in England.” Footnote 12: Published at Amsterdam in 1776. Footnote 13: Vol. I., p. 32. Footnote 14: “History of European Morals,” Third Edition, London, 1877. Footnote 15: “The Descent of Man and Selection in Relation to Sex,” First Edition, vol. I., p. 98. Footnote 16: “Die Darwin’sche Theorie.” Second Edition, 1875, p. 272, note 25. Footnote 17: “The Data of Ethics,” 1879. Footnote 18: The “Lalita Vistara,” translated from Sanscrit into French by Foucaux; “Annales du Musée Guimet,” vol. VI. p. 183. 1884. Footnote 19: Zeller, _loc. cit._ p. 633. Footnote 20: Lecky, “History of European Morals,” chap. iv. Footnote 21: Lecky. Footnote 22: Lecky. Footnote 23: Buckle, “History of Civilisation in England.” Footnote 24: “De Secta Massonum,” Parisiis, 1884, p. 9. The passage was quoted by Brunetière in the “Revue des Deux Mondes,” 1895, vol. CXXVII., p. 116. Footnote 25: Schnaase, “Geschichte der bildenden Künste, vol. III., pp. 577, 584, and vol. IV., p. 718. Footnote 26: “Philosophie de l’Art,” Fourth Edition, 1885, vol. LXXXVIII., p. 352. Footnote 27: Reinhard, “System der christlichen Moral,” vol. IV., 1814, p. 831, and vol. III., p. 14, 1813. Footnote 28: Gaudry, “Mammifères tertiaires,” p. 235, 1878. Footnote 29: Delteil, “La Vanille,” Paris, 1897. Footnote 30: Darwin, “The Fertilisation of Orchids,” Second edition, London, 1877. See also Müller, “Die Befruchtung der Pflanzen durch Insecten,” pp. 74–85, Leipzig, 1873. Footnote 31: _Bulletin de la Société botanique de France_, vol. I., p. 370, 1854. Footnote 32: _Loc. cit._ p. 44. Footnote 33: Darwin, _loc. cit._ p. 179. Footnote 34: _Ibid._ pp. 207–208. Footnote 35: Fabre, “Souvenirs entomologiques,” vol. I., pp. 71–78, Paris, 1879. Footnote 36: _Loc. cit._ p. 201. Footnote 37: _Loc. cit._ pp. 120–121. Footnote 38: “Die Befruchtung der Blumen durch Insekten,” p. 167, 1873. Footnote 39: “Souvenirs entomologiques,” Fourth series, Paris, 1847. Footnote 40: “Recherches sur les Mœurs des Fourmis indigènes,” Paris, 1810. Footnote 41: Féré, “L’Instinct sexuel,” Second Edition, p. 76, Paris, 1902. Footnote 42: Moll, “Untersuch. üb. d. Libido sexualis,” vol. II. pp. 372, 373. Footnote 43: Kœppen, “Insectes invisibles,” vol. II. p. 237, 1883. (In Russian.) Footnote 44: Swammerdam, “Biblia Naturæ,” Leydae, 1737. Footnote 45: Brehm, “Les Insectes,” édit. franç., vol. I., p. 206. Footnote 46: “Descent of Man and Selection in Relation to Sex,” vol. I., chap. 10, p. 345. Footnote 47: R. Dubois, “Les Elatérides lumineux,” p. 209, Meulan, 1886. Footnote 48: Republished, with other essays, as “Man’s Place in Nature,” Macmillan, London, 1894. Footnote 49: Brunetière, _Revue des Deux Mondes_, Jan. 1, 1895, p. 99. Footnote 50: