Focusing on a central problem of the evolution of vertebrae, the author questions whether there is a principle underlying the disparate animal forms. He shows that there is. Following Goethe, he points out that a key to understanding the great variety of vertebrates lies in the plasticity of what he calls the "vertebrate type". He goes on to show how successive classes of vertebrates can be seen as increasingly complete manifestations of the type. Thus the driving forces of evolution are found in the inner lawfulness of living organisms, each of which is itself a manifestation of the type in action.
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Seller: ThriftBooks-Dallas, Dallas, TX, U.S.A.
Paperback. Condition: Very Good. No Jacket. May have limited writing in cover pages. Pages are unmarked. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G0940262932I4N00
Seller: World of Books (was SecondSale), Montgomery, IL, U.S.A.
Paperback. Condition: Good. Considers the evolution of vertebrae and shows that there is a common principle underlying the disparate animal forms. Seller Inventory # 00093302263
Seller: -OnTimeBooks-, Phoenix, AZ, U.S.A.
Condition: good. A copy that has been read, remains in good condition. All pages are intact, and the cover is intact. The spine and cover show signs of wear. Pages can include notes and highlighting and show signs of wear, and the copy can include "From the library of" labels or previous owner inscriptions. 100% GUARANTEE! Shipped with delivery confirmation, if you're not satisfied with purchase please return item! Ships via media mail. Seller Inventory # OTV.0940262932.G
Seller: World of Books Inc, Montgomery, IL, U.S.A.
Paperback. Condition: Good. Considers the evolution of vertebrae and shows that there is a common principle underlying the disparate animal forms. Seller Inventory # CIN0940262932G
Seller: BennettBooksLtd, Los Angeles, CA, U.S.A.
paperback. Condition: New. In shrink wrap. Looks like an interesting title! Seller Inventory # Q-0940262932
Seller: Rare Book Cellar, Pomona, NY, U.S.A.
Softcover. First Edition; First Printing. Near Fine in wraps.; Renewal in Science; 8vo - over 7¾" - 9¾" tall; 192 pages. Seller Inventory # 219340