The Oldest Fossil Fishes


IT has long been known that the fishes of the Down-tonian age-the earliest fishes of which we have any real knowledge-are very different from those which appeared in later times and persist in part to the present day. Prof. Johan Kiaer, of the University of Christiania, discovered fossil fishes in the rocks of this period in southern Norway a few years ago, and the first part of his memoir describing them has recently been issued.1 Prof. Kiser's remarkable specimens add greatly to our knowledge of these fishes, and some of his conclusions are so unexpected that they are of extreme interest to both zoologists and geologists.

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WOODWARD, A. The Oldest Fossil Fishes. Nature 115, 124–125 (1925).

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