1888. Über den Einfluss der festsitzenden Lebensweise auf die Thiere und über den Ursprung der ungeschlichtlichen Fortpflanzung durch Theilung und Knospung. pp. 166. Jena. LOCARD, A. 1892. L’Influence des Milieux sur le Développement des Mollusques. pp. 140. Lyon. MARSHALL, F. H. 1910. The Physiology of Reproduction. pp. 706. London. MILLER, N. 1909. The American Toad (Bufo lentiginosus americanus Le Conte). Amer. Nat., Vol. XLIII, pp. 641-668, 730-745. A study of the natural history of a single species. RIDDLE, O. 1909. The Rate of Digestion in Cold-Blooded Vertebrates,--The Influence of Season and Temperature. Amer. Jour. Physiol., Vol. XXIV, pp. 447-458. RUSSELL, E. S. 1908. Environmental Studies on the Limpet. Proc. Zoöl. Soc., London, 1907, pp. 856-870. SCHIEMENZ, P. 1911. Vergleichung der Fruchtbarkeit von Seen und Flussen. Aus deutscher Fischerei. pp. 75-82. Neudamm. A comparison of the relative productivity of fish in standing and running water environments. SHELFORD, V. E. 1911. Physiological Animal Geography. Jour. Morph., Vol. XXII, pp. 551-618. An important paper. Explains the habitats and distribution of animals as due to physiological responses and characters. The dynamic and genetic standpoint of the present writer (p. 555) is erroneously _contrasted_ with a physiological process. The dynamic includes all processes, the physiologic process is a species of this genus. The genetic is the application of processes to explain origins. The responsive and functional processes are dynamic in character. 1912. Ecological Succession. V. Aspects of Physiological Classification. Biol. Bull., Vol. XXIII, pp. 331-370. Further studies along the lines of the preceding paper. VIRE, A. 1896. Modifications Produced in the Organs of Sense and of Nutrition in Certain Arthropods by Confinement in Caves. Ann. Mag. Nat. Hist. (6), Vol. XVII, pp. 407-408. VOSSELER, J. 1902. Über Anpassung und chemische Vertheidigungs mittel bei nordafrikanischen Orthopteren. Verh. Deutsch. Zool. Gesell. 1902, pp. 108-120. 1902-1903. Beiträge zur Faunistik und Biologie der Orthopteren Algeriens und Tunesiens. Zool. Jahrb. Abteilung f. Syst. Geog. u. Biol. der Tiere, Bd. XVI, pp. 337-404; Bd. XVII, pp. 1-98. _3. Animal Behavior as a Process_ “The actual method of work is to first watch the organism under its natural environment, until one finds out all things it does. Then the environment is changed a little, to see what difference this makes in the behavior. We thus try all sorts of different ways of getting the animal to change its behavior,--including the application of definite chemical and physical reagents of most varied character.... We thus try to find the organism’s system of behavior and the things that influence it,--becoming acquainted with the creature as we might get acquainted with a person with whom we are thrown much in contact.”--H. S. JENNINGS (1910).