[200] Small (op. cit., vol. 11, p. 146) states that in his rats "the persistence of useless motor habits is striking" and "explainable by the supposition that the movements are touched off automatically."
[201] Op. cit., vol. 12, p. 214.
[202] Op. cit., p. 28.
[203] The Instincts, Habits and Reactions of the Frog, Harvard Psychological Studies, vol. 1, pp. 591-593, 1903.
[204] Small: op. cit., vol. 12, pp. 230, 231.
[205] Op. cit., pp. 318, 319.
[206] C. L. Morgan: Animal Behaviour, pp. 179-193, London, 1900; Animal Life, and Intelligence, p. 453, Boston, 1891.
[207] Thorndike: op. cit., pp. 54, 56, 57, 60, 61; The Mental Life of the Monkeys, Psychological Review, Monograph Supplement, vol. 3, pp. 318, 319, 1901. Kinnaman: op. cit., pp. 198-200.
[208] Small: op. cit., vol. II, p. 160.
[209] W. Mills: Nature of Animal Intelligence and Methods of Investigating It, Psychological Review, vol. 10, pp. 262-274, 1897.