[154] Ibid. vol. viii. p. 507.

[155] Ibid. p. 509.

[156] Proc. Zool. Soc. 1868, p. 482

[157] "Origin of Species," 5th edition, 1869, p. 454.

[158] "Origin of Species," 5th edition, p. 459.

[159] See Ann. and Mag. of Nat. Hist., July 1870, p. 37.

[160] Professor Huxley's Lectures on the Elements of Comp. Anat. p. 184.

[161] For an enumeration of the more obvious homological relationships see Ann. and Mag. of Nat. Hist. for August 1870, p. 118.

[162] See Ann. and Mag, of Nat. Hist., July 1870.

[163] Treatise on the Human Skeleton, 1858.