200 BIBLIOGRAPHY. 



1897. 



14. The Discrimination of Species and Subspecies. <Science, N. S., V, pp. 877-879, 



June 4, 1897. 



Apropos of Dr. C. H. Merriam's 'Suggestions for a New Method of Discriminating be- 

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1898. 



15. ' A Precise Criterion of Species.' <Science, N. S., VII, pp. 801-802, June 10, 1898 . 



A criticism of Davenport and Blankinship's paper of this title in Science for May 20, 

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1899. 



16. Davenport's Statistical Methods. <Amer. Nat, } XXXIII, pp. 974-975. 



Criticism of 'Statistical Methods with special reference to Biological Variation' by C. B. 

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1902. 



17. 'So-called Species and Subspecies.' <Science, N. S., XVI, pp. 383-386, Sept. 5, 



1902. 



Discussion of the subject, apropos of an article under the same title in a previous number 

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1905. 



18. The Probable Origin of Certain Birds. <Science, N. S., XXII, No. 562, pp. 431- 



434, Oct. 6, 1905. 



Criticism of W. E. D. Scott's resort to the 'mutation theory' of deVries, in accounting for 

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19. The Evolution of Species through Climatic Conditions. <Science, N. S., XXII, 



No. 569, pp. 661-668, Nov. 24, 1905. 



Apropos of a paper by D. S. Jordan on 'The Origin of Species through Isolation' (Science, 

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1906. 



20. Heredity and Subspecies. <Science, N. S., XXIII, pp. 142-145, Jan. 26, 1906. 



Discussed with reference to papers by Dr. D. S. Jordan on the same subject in previous 

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21 . 1 Barriers ' and ' Bionomic Barriers ' ; or Isolation and Non-Isolation as Bionomic 



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In reference to papers on the same subject by Jordan and Evermann in previous issues 

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1907. 



22. Mutations and the Geographic Distribution of nearly related Species in Plants 

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