Plate 23: Middle Cambrian Annulata (Canadia and Aysheaia) 1. Canadia setigera Walcott = 2. Canadia setigera Walcott = 3. Canadia setigera Walcott = 4. Canadia spinosa Walcott = 5. Canadia spinosa Walcott = 6. Canadia spinosa Walcott = 7. Canadia spinosa Walcott = 8. Aysheaia pedunculata Walcott = 9. Aysheaia pedunculata Walcott = . 1911 65 Walcott Cambrian Geology and Paleontology II plate 23

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