APPENDIX IV. 
LIST OF PAPERS ON EVOLUTION BY JOHN T. GULICK. 
An article published in Nature, July 18, 1872, entitled :— 
The Variation of Species as related to thetr Geographical Distribution, illustrated 
by the Achatinelline. 
Three papers published in the Linnean Society’s Journal, Zodlogy, vols. x1, 
XX, Xx, as follows: 
Diversity of Evolution under One Set of External Conditions, in 1872. 
Divergent Evolution through Cumulative Segregation, in 1887; reproduced in the 
Smithsonian Report for 1891; a small portion of the same is also given in Appendix 
I of this volume. 
Intensive Segregation, in 1889; reproduced in Appendix II of this volume. 
Three articles published in the American Journal of Science for January, July, 
and December, 1890, as follows: 
Divergent Evolution and the Darwinian Theory. ; 
The Inconsistencies of Utilitarianism as the exclusive Theory of Evolution. 
The Preservation and Accumulation of Cross-Inferiility. 
Four letters published in Nature, and reproduced in Appendix III of this 
volume. 
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