13 (return) [ Professor Owen expressly states (Proc. Zoolog. Soc. 1830, p. 28) that this is the case with respect to the Orang, and specifies all the more important muscles which are well known to serve with man for the expression of his feelings. See, also, a description of several of the facial muscles in the Chimpanzee, by Prof. Macalister, in ‘Annals and Magazine of Natural History,’ vol. vii. May, 1871, p. 342.] 14 (return) [ ‘Anatomy of Expression,’ pp. 121, 138.] 15 (return) [ ‘De la Physionomie,’ pp. 12, 73.] 16 (return) [ ‘Mécanisme de la Physionomie Humaine,’ 8vo edit. p. 31.] 17 (return) [ ‘Elements of Physiology,’ English translation, vol. ii. p. 934.] 18 (return) [ ‘Anatomy of Expression,’ 3rd edit. p. 198.] 19 (return) [ See remarks to this effect in Lessing’s ‘Lacooon,’ translated by W. Ross, 1836, p. 19.] 20 (return) [ Mr. Partridge in Todd’s ‘Cyclopædia of Anatomy and Physiology,’ vol. ii. p. 227.] 21 (return) [ ‘La Physionomie,’ par G. Lavater, tom. iv. 1820, p. 274. On the number of the facial muscles, see vol. iv. pp. 209-211.] 22 (return) [ ‘Mimik und Physiognomik,’ 1867, s. 91.] 101 (return) [ Mr. Herbert Spencer (‘Essays,’ Second Series, 1863, p. 138) has drawn a clear distinction between emotions and sensations, the latter being “generated in our corporeal framework.” He classes as Feelings both emotions and-sensations.] 102 (return) [ Müller, ‘Elements of Physiology,’ Eng. translat. vol. ii. p. 939. See also Mr. H. Spencer’s interesting speculations on the same subject, and on the genesis of nerves, in his ‘Principles of Biology,’ vol. ii. p. 346; and in his ‘Principles of Psychology,’ 2nd edit. pp. 511-557.] 103 (return) [ A remark to much the same effect was made long ago by Hippocrates and by the illustrious Harvey; for both assert that a young animal forgets in the course of a few days the art of sucking, and cannot without some difficulty again acquire it. I give these assertions on the authority of Dr. Darwin, ‘Zoonomia,’ 1794, vol. i. p. 140.] 104 (return) [ See for my authorities, and for various analogous facts, ‘The Variation of Animals and Plants under Domestication,’ 1868, vol. ii. p. 304.] 105 (return) [ ‘The Senses and the Intellect,’ 2nd edit. 1864, p. 332. Prof. Huxley remarks (‘Elementary Lessons in Physiology,’ 5th edit. 1872, p. 306), “It may be laid down as a rule, that, if any two mental states be called up together, or in succession, with due frequency and vividness, the subsequent production of the one of them will suffice to call up the other, and that whether we desire it or not.”] 106 (return) [ Gratiolet (‘De la Physionomie,’ p. 324), in his discussion on this subject, gives many analogous instances. See p. 42, on the opening and shutting of the eyes. Engel is quoted (p. 323) on the changed paces of a man, as his thoughts change.] 107 (return) [ ‘Mécanisme de la Physionomie Humaine,’ 1862, p. 17.]