[132] Der Kampf der Theile im Organismus, Leipzig, 1881.
[133] Leipzig, 1904.
[134] Berlin, 1876.
[135] Wonders of Life, London and New York, 1904.
[136] Eng. transl.; The Evolution of Man, 2 vols., London, 1879 and 1905.
[137] Origin of Species (6th edit.), p. 396.
[138] Eng. transl.; Facts and Arguments for Darwin, London, 1869.
[139] 3 vols., Berlin, 1894-96.
[140] Descent of Man (Popular Edit.), p. 927.
[141] Gesammelte Abhandlungen zur wissenschaftlichen Medizin, Berlin, 1856.