Plate 8: Middle Cambrian Medusa and Holothurian (Peytoia and Eldonia) 1. Peytoia nathorsti Walcott = 2. Peytoia nathorsti Walcott = 3. Eldonia ludwigi Walcott = . 1911 67 Walcott Cambrian Geology and Paleontology II plate 08

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