chiton, coat-of-mail shell, sea cradle, polyplacophore
['Gila monster, Heloderma suspectum', 'cabbage butterfly', 'coil, spiral, volute, whorl, helix', 'coral reef', 'echidna, spiny anteater, anteater', 'cardoon', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus']