Page:Walcott A Geologists Paradise.djvu/9

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A GEOLOGIST'S PARADISE
517
THE KING OF THE ANIMAL WORLD 15 MILLION YEARS AGO; DISCOVERED BY MR. WALCOTT
The Spiny claws of the Middle Cambrian crustacean (Sidneyia inexpectans), shown as a light patch in the center of the figure on page 516 (see page 511).