#455 Egg-eating Snakes

Egg-eating snakes are a small group of snakes whose ___ consists only of eggs. Some eat only small eggs, which they have to swallow ___ , as the snake has no teeth. Instead, some other snakes eat bigger eggs, but it requires special ___ . These snakes have spines that stick ___ from the backbone. The spines crack the egg ___ as it passes through the throat.