Possible Clues:

• They can tot it up, even being footless
• Long summers?
• Sounds as if they get some answer, even when footless
• They can't reach the total by the foot
• The ones that get the totals without any limbs
• They might make more of being footless
• Totters when footless?
• Can they totter along without any feet?
• Are snake-house keepers put upon by them?
• Even without feet they might totter along