120 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1920. 



11. Some problems of international readjustment of mineral supplies as indi- 

 cated in recent foreign literature, by Eleanora F. Bliss. 



12. Reptile reconstructions in the United States National Museum, by 

 Charles W. Gilmore. 



13. A Pleistocene cave deposit of western Maryland, by J. W. Gidley. 



14. Paleobotany: A sketch of the origin and evolution of floras, by Edward 

 W. Berry. 



15. The direct action of environment and evolution, by Prince Kropotkin. 



16. The law of irreversible evolution, by Branislav Petronievics. 



17. The fundamental factor of insect evolution, by S. S. Chetverikov. 



18. The psychic life of insects, by E. L. Bouvier. 



19. Sexual selection and bird song, by Ohauncey J. Hawkins. 



20. Marine camoufleurs and their camouflage: The present and prospective 

 significance of facts regarding coloration of tropical fishes, by W. H. Longley. 



21. Foot-plow agriculture in Peru, by O. F. Cook. 



22. Sun worship of the Hopi Indians, by J. Walter Fewkes. 



23. The League of the Iroquois and its constitution : A constitutional league 

 of peace in the Stone Age of America, by J. N. B. Hewitt. 



24. The problem of degeneracy, by H. F. Tredgold. 



25. History in tools, by W. M. Flinders Petrie. 



26. The background of Totemism, by E. Washburn Hopkins. 



27. A great naturalist: Sir Joseph Hooker, by Sir E. Ray Lankester. 



KEPORT FOE 1919. 



The report of the executive committee and proceedings of the 

 Board of Regents of the Institution and report of the Secretary, both 

 forming part of the annual report of the Board of Regents to Con- 

 gress, were issued in pamphlet form in November, 1919. 



Report of the executive committee and proceedings of the Board of Regents 

 of the Smithsonian Institution for the year ending June 30, 1919. 18 pp. 

 (Publ. 2548.) 



Report of the Secretary of the Smithsonian Institution for the year ending 

 June 30, 1919. 106 pp. (Publ. 2547.) 



The general appendix to this report was in preparation but did 

 not go to the printer until shortly after the close of the year. 



SPECIAL PUBLICATIONS. 



The following special publication was issued: 



Publications of the Smithsonian Institution issued between October 16, 1918 

 and July 16, 1919. August 12, 1919. 1 p. (Publ. 2541.) 



PUBLICATIONS OF THE UNITED STATES NATIONAL MUSEUM. 



The publications of the National Museum are : (a) The annual re- 

 port to Congress: (&) the proceedings of the United States National 

 Museum ; and (c) the Bulletin of the United States National Museum, 

 which includes the Contributions from the United States National 

 Herbarium. The editorship of these publications is vested in Dr. 

 Marcus Benjamin. 



