flatworm, platyhelminth
['coil, spiral, volute, whorl, helix', 'rock crab, Cancer irroratus', 'sea lion', 'submarine, pigboat, sub, U-boat', 'hippopotamus, hippo, river horse, Hippopotamus amphibius', "loupe, jeweler's loupe", "yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum"]