Note BO — LECTURE IV.
Reading edition
Contributions to the Natural History of the United States, Introduction, Boston, 1857; and Essay on Classification, p. 15, published separately; London, 1859. See Appendix VI.
Reading edition
Contributions to the Natural History of the United States, Introduction, Boston, 1857; and Essay on Classification, p. 15, published separately; London, 1859. See Appendix VI.