372 The Animal Mind 



785. Whitman, C. 0., 1898. Animal behavior. Biol. Lectures, 



Marine Biol. Lab., Wood's Hole, 1898, p. 285. 



786. Will, F., 1885. Das Geschmacksorgan der Insekten. Leipzig. 



787. WiLLEM, v., 1891. Sur les perceptions dermatologiques. 



Bull, scient. de la France et de la Belgique, t. 23, p. 329. 



788. 1892. De la vision chez les mollusques gasteropodes 



pulmones. Arch, de biol., t. 12, p. 57. 



789. 1892. Les gasteropodes perjoivent-ils les rayons ultra- 

 violets? Ibid., t. 12, p. 99. 



790. 1892. Observations sur la vision et les organes visuels 



de quelques mollusques prosobranches et opisthobranches. 

 Ibid., t. 12, p. 123. 



791. Wilson, E. B., 1891. The heliotropism of Hydra. Am. Nat., 



vol. 25, p. 413. 



792. Wither, L., 1909. A monkey with a mind. Psych. Cliuic, 



vol, 3, p. 179. 



793. 1909- Intelligent imitation and curiosity in a monkey. 



Ibid., vol. 3, p. 225. 



794. WoDSEDALEK, J. E., 1911. Phototactic reactions and their 



reversal in the mayfly nymphs, Heptagenia inter punctata 

 (Say). Biol. Bull., vol. 21, p. 265. 



795. 191 2. Formation of associations in the mayfly nymphs, 



Heptagenia interpunctata (Say). Jour. Animal Behav., vol. 

 2, p. r. 



796. WooDWOETH, R. S., 1906. The cause of a voluntary movement. 



No. 12 in Studies in philosophy and psychology by former 

 students of Charles Edward Garman. Boston. 



797. WuNDT, W., 1894. Lectures on human and animal psychology. 



Trans, by J. E. Creighton and E. B. Titchener. London. 



798. Yerkes, A. W., 1906. Modifiability of behavior in Hydroides 



dianthus. Jour. Comp. Neur. and Psych., vol. 16, p. 441. 



799. Yerkes, R. M., 1900. Reactions of Entomostraca to stimu- 



lation by light, I. Am. Jour. Physiol., vol. 3, p. 137. 



800. 1901. Reactions, etc., II. Reactions of Daphnia and 



Cypris. Ibid., vol. 4, p. 405. 



801. 1901. The formation of habits in the turtle. Pop. 



Sci. Mo., vol. 58, p. 519. 



802. 1902. A contribution to the physiology of the nervous 



system in the medusa Gonionemus murbachii, I. The 



