1910. Diverse Ideals and Divergent Conclusions in the Study of Behavior in Lower Organisms. Amer. Jour. Psychol., Vol. XXI, pp. 349-370. Valuable for its discussion of points of view in the study of behavior. KELLOGG, J. L. 1900. Observations on the Life-History of the Common Clam, Mya Arenaria. Bull. U. S. Fish and Fisheries Comm. for 1899, Vol. XIX, pp. 193-202. 1903. Feeding Habits and Growth of Venus Mercenaria. Bull. 71, N. Y. State Museum. pp. 27. Albany. 1904. Conditions Governing Existence and Growth of the Soft Clam (Mya Arenaria). Rep. U. S. Comm. Fish and Fisheries for 1903, pp. 195-224. A suggestive paper. 1905. Notes on Marine Food Mollusks of Louisiana. Bull. No. 3, Gulf Biologic Station. pp. 43. Baton Rouge. All of these papers by Kellogg are careful studies of the relation of animals to their environment. They also show the intimate relation of ecology to economic problems. Biological surveys intended for economic results should be ecological in their method. 1910. Shell-Fish Industries. pp. 361. New York, Henry Holt and Co. A popular summary of the marine shell-fish industries of the American coast, from the standpoint of their biology, culture, and utilization. The oyster, hard and soft clams, and scallops are considered. The following subjects deserve mention: ciliary action, feeding reflexes, function of mucus, and food. LEFEVRE, G., and CURTIS, W. C. 1912. Studies on the Reproduction and Artificial Propagation of Fresh-water Mussels. U. S. Bur. Fisheries for 1910, Bull. Vol. XXX, pp. 105-201. LYON, E. P. 1904. On Rheotropism. I. Rheotropism in Fishes. Amer. Jour. Physiol., Vol. XII, pp. 149-161. MAST, S. O. 1911. Light and the Behavior of Organisms. pp. 410. New York. An elaborate treatise on reactions to light. MEAD, A. D. 1900. The Natural History of the Star-fish. U. S. Fish Comm. Bull. for 1899, Vol. XIX, pp. 203-224. MICHAEL, E. 1911. Classification and Vertical Distribution of the Chætognatha of the San Diego Region. Univ. of Calif. Pub. Zoöl., Vol. VIII, pp. 21-186. The distribution is studied as a response to the conditions of life, and the optima are determined. MILLS, W. 1898. The Nature and Development of Animal Intelligence. pp. 307. New York. Valuable account of the habits of squirrels. Observations on hibernation, and on the psychic development of the young of some of the domestic animals. MONTGOMERY, T. H. 1903. Studies on the Habits of Spiders, particularly those of the Mating Period. Proc. Acad. Nat. Sci. Phila., 1903, pp. 59-149. Contains a valuable bibliography. 1908. Further Studies on the Activities of Araneads. Amer. Nat., Vol. XLII, pp. 697-709. 1910. Further Studies on the Activities of Araneads, II. Proc. Acad. Nat. Sci. Phila., 1909, pp. 548-569. 1910. The Significance of the Courtship and Secondary Sexual Characters of Araneads. Amer. Nat., Vol. XLIV, pp. 151-177. NEWMAN, H. H.