Chapter VII

, for further references. Marsh: _Pop. Sci. Mo._, vol. 13, 1878; Sketches of, _Nature_, vol. 59, 1898-99; _Science_, vol. 9, 1899; _Am. J. Sci._, vol. 157, 1899. Zittel: Biographical Sketch with portrait, Schuchert, _Ann. Rept. Smithson. Inst._, 1903-1904. Osborn, Papers on Paleontological Discovery in Science from 1899 onward. The Fayûm Expedition of the Am. Museum of Nat. History, _Science_, March 29, 1907.

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Note. Since the four succeeding chapters deal with the Evolution Theory, it maybe worth while to make a few general comments on the literature pertaining to Organic Evolution. The number of books and articles is very extensive, and I have undertaken to sift from the great number a limited list of the more meritorious. Owing to the prevalent vagueness regarding evolution theories, one is likely to read only about Darwin and Darwinism. This should be avoided by reading as a minimum some good reference on Lamarck, Weismann, and De Vries, as well as on Darwin. It is well enough to begin with Darwin's Theory, but it is not best to take his Origin of Species as the first book. To do this is to place oneself fifty years in the past. The evidences of Organic Evolution have greatly multiplied since 1859, and a better conception of Darwin's Theory can be obtained by reading first Romanes's Darwin and After Darwin, vol. I. This to be followed by Wallace's Darwinism, and, thereafter, the Origin of Species may be taken up. These will give a good conception of Darwin's Theory, and they should be followed by reading in the order named: Packard's Lamarck; Weismann's The Evolution Theory; and De Vries's The Origin of Species and Varieties by Mutation. Simultaneously one may read with great profit Osborn's From the Greeks to Darwin.

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