[6] "A classification of any large portion of the field of Nature, in conformity to the foregoing principles, has hitherto been found practicable only in one great instance, that of animals."—Logic, third edition, 1851, vol. i., chap. viii. § 5, page 279.
[7] Contemporary Review, July, 1879, pp. 716 and 717.
[8] L. c. p. 717.
[9] Contemporary Review, July, 1879: "What are Living Beings?"
[10] Very small deer, commonly called in error musk-deer.
[11] The European beavers have abandoned the dam-building habit. They retained it, however, as late as the thirteenth century.
[12] By the Author in a Paper read before the Zoological Society in Nov. 1864. See also his "Man and Apes," Hardwicke, 1873; and the article "Ape" in the "Encyclopædia Britannica," vol. ii. p. 148.
[13] "Histoire Naturelle," tome xiv. p. 61, 1766.
[14] For an explanation of the zoological system of nomenclature which has been adopted since the time of Linnæus, see Contemporary Review for May, page 262.
[15] See ante, p. 14.