A remarkable and little known paper on the struggle for existence in the sea. FORBES, S. A. 1887. The Lake as a Microcosm. Bull. Sci. Assoc. of Peoria, Illinois, 1887, pp. 77-87. Reprinted, with revisions, as from the Bull. Peoria Sci. Association, 1887, pp. 1-15. An excellent picture of the struggle for existence in a lake, where the life is considered as a microcosm or social community. 1880. On Some Interactions of Organisms. Bull. Ill. State Lab. Nat. Hist., Vol. I, No. 3, pp. 1-18. Second Edition. 1903. 1882. The Ornithological Balance-Wheel. Trans. Ill. State Hort. Soc. for 1881, N. S., Vol. XV, pp. 120-131. 1883. The Regulative Action of Birds upon Insect Oscillations. Bull. Ill. State Lab. Nat. Hist., Vol. I, No. 6, pp. 3-32. These three papers are very important for their discussion of the dynamic character of the struggle among organisms, and how the balance of nature is maintained. 1888. On the Food Relations of Fresh-Water Fishes: a Summary and Discussion. Bull. Ill. State Lab. Nat. Hist., Vol. II, pp. 475-538. A summary of the food of fishes, based upon a detailed study of the contents of their stomachs. RODWAY, J. 1911. In the Guiana Forest, Studies of Nature in Relation to the Struggle for Life. Second Edition, pp. 326. London. A graphic account of the biotic competition in the tropics. JOHNSTONE, J. 1908. Conditions of Life in the Sea. pp. 332. Cambridge, England. An excellent study of the recent quantitative investigations of marine life. ADAMS, CHAS. C. 1909. The Ecological Succession of Birds. Ann. Rep. Mich. Geol. Surv. for 1908, pp. 121-154. Ecological succession is discussed from the process standpoint. References to literature on birds. FORBUSH, E. H. 1899. Nature’s Foresters. Forty-sixth Ann. Rep. Sec. Mass. State Board Agr. for 1898, pp. 279-294. 1901. Birds as Protectors of Woodlands. Forty-eighth Ann. Rep. Sec. Mass. State Board Agr. for 1900, pp. 300-321. 1904. The Destruction of Birds by the Elements in 1903-1904. Fifty-first Ann. Rep. Sec. Mass. State Board Agr. for 1903, pp. 457-503. 1905. Special Report on the Decrease of Certain Birds, and its Causes, with Suggestions for Bird Protection. Fifty-Second Ann. Rep. Sec. Mass. State Board Agr. for 1904, pp. 429-543. PALMER, T. S. 1898. The Danger of Introducing Noxious Animals and Birds. Yearbook U. S. Dept. Agr. for 1898, pp. 87-110. RYDER, J. A. 1892. A Geometrical Representation of the Relative Intensity of the Conflict between Organisms. Amer. Nat., Vol. XXVI, pp. 923-929. MCATEE, W. L. 1912. The Experimental Method of Testing the Efficiency of Warning and Cryptic Coloration in Protecting Animals from their Enemies. Proc. Acad. Nat. Sci. Phila., 1912, pp. 281-364. JUDD, S. D. 1899. The Efficiency of Some Protective Adaptations in Securing Insects from Birds. Amer. Nat., Vol. XXXIII, pp. 461-484. 1902. The Birds of a Maryland Farm. U. S. Dept. Agr., Div. Biol. Surv., Bull. No. 17. pp. 116.