Published, in part, as 1.568-572. Unpublished (pp. 11-20): The classification of the animal world is continued. CSP's admission of his slight acquaintance with zoology and, in spite of his study of classification under Agassiz for six months (1860), his "incapacity" for this kind of work. An examination of Huxley's classification of fish. Also unpublished (pp. R9.1-9.8): Artificial things are classified, with a view toward establishing trichotomies.
Agassiz Louis, Categories, biological Classification, Huxley Thomas H., Thirdness, Zoology
pp. 1-20, with 2 pp. of variants plus 10 pp. of an untitled earlier draft (9/11/10)