BIBLIOGRAPHY 



by a thoroughly competent critic. With abundant 

 references to and quotations from recent evolutionary 

 literature.] 



KEOPOTKIN, P." Mutual Aid a Factor of Evolution." 1902. 

 [A valuable account of the inadequately appreciated 

 "other side" of the struggle for existence.] 



LANKESTER, E. RAY. ' ' The Advancement of Science. " 1 890. 

 [Important essays on "Degeneration: a chapter in 

 Darwinism," "A Theory of Heredity," "The History 

 and Scope of Zoology," etc.] See also "The Kingdom 

 of Man/ 1906. 



*LOCK, R. H. "Recent Progress in the Study of Variation, 

 Heredity, and Evolution. 1908. [A useful introduction 

 to recent researches.] 



LOTSY, J. P. " Vorlesungen iiber Descendenztheorien. 2 vols,, 

 1907 and 1909. [A scholarly text-book of evolution.] 



MARSHALL, A. MILNKS. "Lectures on the Darwinian 

 Theory." 1894. [An admirably clear and vigorous 

 presentation of Darwinism and of the evidences of 

 evolution.] See also " Biological Lectures and Addresses.** 

 1894. 



MARSHALL, F. H. A. "The Physiology of Reproduction." 

 1910. [A masterly work with many bearings on evolution 

 problems.] 



MERZ, J. T." History of Scientific Thought in the Nineteenth 

 Century." 2nd vol., 1904. [The finest exposition of tha 

 import and development of "the genetic view of Nature." 

 A work of magistral scholarship and deep insight.] 



*METCALF. " Outline of the Theory of Organic Evolution." 

 1904. [A useful introduction.] 



**MOROAN, 0. LLOYD. "Habit and Instinct." 1896. [The 

 most important book on instinct] See also "Animal 

 Life and Intelligence" (1890); revised edition, entitled 

 "Animal Behaviour." 1900. 



MORGAN, T. H. "Evolution and Adaptation." 1903. [An 

 important critical essay.] 



** "Experimental Zoology." 1907. [An indispensable 



account of recent experimental researches bearing on 

 evolution. A worthy supplement to Semper's great 

 work, "Animal Life."] 



NAGELI, C. VON. " Mechanisch-physiologische Theorie der 

 Abstarnmungslehre. " 1884. [The most effective pre- 

 sentation as yet given of the theory of organism*! 

 variation ia definite directions.] 



