flatworm, platyhelminth
['puck, hockey puck', 'hammerhead, hammerhead shark', 'leaf beetle, chrysomelid', 'ringlet, ringlet butterfly', 'harvestman, daddy longlegs, Phalangium opilio', 'croquet ball', "yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum"]