[169] Dr. Cobbold has informed the Author that he has never observed a planaria divide spontaneously, and he is sceptical as to that process taking place at all. Dr. H. Charlton Bastian has also stated that, in spite of much observation, he has never seen the process in _vorticella_.

[170] Professor Huxley's Hunterian Lecture, March 16, 1868.

[171] Ibid. March 18.

[172] "Principles of Biology," vol. ii. p. 105.

[173] "Principles of Biology," vol. ii. p. 203.

[174] Quoted by H. Stannius in his "Handbuch der Anatomie der Wirbelthiere," Zweite Auflage, Erstes Buch, -- 7, p. 17.

[175] In his last Hunterian Course of Lectures, 1869.

[176] "The Science of Abnormal Forms."

[177] "Animals and Plants under Domestication," vol. ii. p. 322; and "Origin of Species," 5th edition, 1869, p. 178.

[178] A remarkable woman exhibited in London a few years ago.

[179] "Animals and Plants under Domestication," vol. ii. p. 328.

[180] "Ueber das Gliedmaa.s.senskelet der Enaliosaurier, Jenaischen Zeitschrift," Bd. v. Heft 3, Taf. xiii.

[181] In his work on the Carpus and Tarsus.

[182] An excellent specimen displaying this resemblance is preserved in the Museum of the Royal College of Surgeons.

[183] Phil. Trans. 1867, p. 353.

[184] Proc. Zool. Soc. 1865, p. 255.

[185] Ibid. p. 351.

[186] "Hist. Generale des Anomalies," t. i. p. 228. Bruxelles, 1837.

[187] Nov. Comment. Petrop. t. ix. p. 269.

[188] Read on June 2, 1868, before the Ma.s.sachusetts Medical Society. See vol. ii. No. 3.

[189] "Animals and Plants under Domestication," vol. ii. p. 322.

[190] "Lectures on Surgical Pathology," 1853, vol. i. p. 18.

[191] "Lectures on Surgical Pathology," 1853, vol. i. p. 22.

[192] See "Medico-Chirurgical Transactions," vol. xxv. (or vii. of 2nd series), 1842, p. 100, Pl. III.

[193] Med.-Chirurg. Trans, vol. xxv. (or vii. of 2nd series), 1842, p. 122.

[194] See _Boston Medical and Surgical Journal_ for April 5, 1866, vol.

lxxiv. p. 189.

[195] "Principles of Biology," vol. i. p. 180.

[196] See the "Proceedings of the Boston Society of Natural History," vol.

xi. June 5, 1867.

[197] "Habit and Intelligence," vol. i. p. 75.

[198] Ibid. p. 112.

[199] Ibid. p. 170.

[200] "Habit and Intelligence," vol. i. p. 229.

[201] It is hardly necessary to say that the Author does not mean that there is, in addition to a real objective crystal, another real, objective separate thing beside it, namely the "force" directing it. All that is meant is that the action of the crystal in crystallizing must be _ideally_ separated from the crystal itself, not that it is _really_ separate.

[202] "Origin of Species," 5th edition, 1869, p. 577.

[203] Vol. ii. p. 122.

[204] "Animals and Plants under Domestication," vol. i p. 295.

[205] "Natural Selection," p. 350.

[206] "Animals and Plants under Domestication," vol. ii.

[207] See 2nd edition, vol. i. p. 214.

[208] Page 103.

[209] I have not the merit of having noticed this inconsistency; it was pointed out to me by my friend the Rev. W. W. Roberts.

[210] Vol. i. p. 215.

[211] "Malay Archipelago," vol. ii. p. 365.

[212] "The Origin of Civilization and the Primitive Condition of Man," p.

261. Longmans, 1870.

[213] "Primitive Man," p. 248.

[214] "Fiji and the Fijians," vol. i. p. 183.

[215] "Essays," Second Series, vol. ii. p. 13.

[216] See No. 117, July 1869, p. 272.

[217] _Macmillan's Magazine_, No. 117, July 1869.