Related Clues:

• Periwinkle, for one
• Sluggish sort
• Red-eared slider, e.g.
• Mollusk that moves like molasses
• Kind of sea-tortoise, noted for soup
• Mollusc with coiled shell
• Its speed was emulated by Shakespeare's creeping schoolboy
• Reptile with a bony shell
• Sea creature like tortoise
• Common garden mollusc
• Reptile with bony shell
• Sea-creature resembling tortoise
• Aquatic or terrestial reptile
• Mollusc with spiral shell
• Sea-creature resembling a tortoise