254 BIBLIOGRAPHY 



[A scholarly and lucid text-book of evolution, in part 

 Lamarckian.] 



**POULTON, E. B. "Essays on Evolution, 1889-1907." 

 [Very valuable critical and historical studies, and 



applications of the theory of evolution to mimicry and 



protective coloration in insects.] 

 * "Charles Darwin and the Theory of Natural Selection " 



1896. 



**PRZIBRAM. Experimental Zoology, Part I, Trans. 1908. 

 [Acute discussion by an expert investigator of the results 

 of experimental embryology.] 



*PUNNETT, R. C. "Mendelism." 2nd Edition, 1905. [An 

 unsurpassed exposition by an expert investigator.] 



RADL, EM. "Geschichte der biologischen Theorien." 2nd 

 Part, 1909. [An able historical and critical discussion 

 of biological theories and of Darwinism in particular.] 



REID, G. ARCHDALL. "The Laws of Heredity." 1910. See 

 also "The Principles of Heredity." 1906. 



RIGNANO, E. "Ueber die Vererbung erworbener Eigen- 

 schaften." 1907. [A careful discussion of the question of 

 the transmission of acquired characters.] 



ROMANES, G. J. "Darwin and after Darwin." 3 vols., 1892- 

 97. [A valuable exposition of Darwinism with many 

 original suggestions and criticisms, and with an important 

 discussion of isolation.] 



SCHNEIDER, K. C. "Einfiihrung in die Descendenz-theorie." 

 1906. [A fresh and lucid statement of the evidences of 

 evolution, with a short account of the chief theories.] 



SEMON, R. "Die Mneme als erhaltendes Princip im Wechsel 

 des organischen Geschehens." 1904. [A modernized 

 Lamarckism.] 



**SEMPER, KARL. "The Natural Conditions of Existence as 

 they affect Animal Life." 1881. [One of the finest and 

 soundest of biological books, with an educative sceptical 

 reserve, discussing in particular the influence of the en- 

 vironment, but before the question of the transmission of 

 somatic modifications had become urgent.] 



SEWARD, A. C. (Editor). "Darwin and Modern Science." 

 1909. [A valuable series of essays by representative 

 biologists.] 



***SPENCER, HERBERT. "Principles of Biology." 2 vols., 

 London, 1866-68. Revised Edition, 1908. [This was, in 

 its time, a masterpiece, a magnificent "materialism," an 

 incomparably acute analysis and re-synthesis of the 

 biology of the day. The re-edition was, in our judgment, 

 less valuable, because it did not really assimilate the 

 progress that had been made.] 



