OTHER THEORIES OF SPECIES-FORMING. 213 



"Uber Leben und Tod," 1884. 



"Die Continuitat des Keimplasmas als Grundlage einer Theorie 

 der Vererbung," 1885. 



"liber den Riickschritt in der Natur," 1886. 



"Uber die Bedeutung der Sexuellen Fortpflanzung fiir die Selec- 

 tionstheorie," 1887. 



"Uber die Zahl der Richtungskorper und iiber ihre Bedeutung 

 fiir die Vererbung," 1887. 



"Botanische Beweise fiir eine Vererbung erworbener Eigenschaf- 

 ten," 1888. 



"Uber die Hypothese einer Vererbung von Verletzungen," 1889. 



"Bemerkungen zu einigen Tages Probleme," 1890. 



"Gedanken iiber Musik bei Tieren und beim Menschen," 1890. 



"Aufsatze iiber Vererbung und verwandte Biologic," 1892. (This 

 includes the eleven preceding papers now published in book- 

 form. These essays have also been translated into French, 

 by H. de Varigny, and published under the title: "Essais sur 

 1'Heredite et la Selection Naturelle," 1892; and also in Eng- 

 lish as "Essays upon Heredity and Kindred Biological Prob- 

 lems," trans, and ed. by Poulton, Shoneland, and Shipley, 2 

 vols., 1891 and 1893. 



"Amphimixis oder die Vermischung der Individuen," 1891. 



"Das Keimplasma; eine Theorie der Vererbung," 1892; Eng. 

 trans., by Parker and Ronnfeldt, as "The Germ-plasm; a 

 Theory of Heredity," 1893. 



"Die Allmacht der Naturziichtung, eine Erwiderung an H. Spen- 

 cer," 1893 ; also in English as "The All-sufficiency of Natural 

 Selection," in the Contemp. Review, Vol. LXIV,- pp. 309-338, 

 596-610, 1893. 



"The Effects of External Influences upon Development," Romanes 

 Lectures, 1894 ; also in German as "Aussere Einfliisse als 

 Entwicklungsreize," 1894. 



"Neue Gedanken zur Vererbungsfrage," 1894. 



"Uber Germinal-Selection," in Compt. Rendus, 3d Congress In- 

 ternat. Zool., 1896; also, in English, trans, and ed. by Mc- 

 Cormack, as "On Germinal Selection as a Source of Definite 

 Variation," 1896. 



"Thatsachen u. Auslegungen in Bezug auf Regeneration," Anat. 

 Anzeig., Vol. XV, 1899. 



"Vortrage iiber Descendenztheorie," 2 vols., 1902; also in Eng., 

 trans, by . J. A. Thomson as "Lectures on the Theory of 

 Descent." 2 vols., 1904. 



8 For a detailed critical discussion of panmixia, see Wolff, "Der 

 gegenwartige Stand des Darwinismus," 1896. 



