Snails ν. Glow-Worms

SOME years ago I brought three glow-worms from Wales to London, and at night I put them on the grass, when all showed their lights ; but on looking for them a short time after, one had nearly disappeared, and on searching for it my hand came against something cold, and on taking it to the light I found it was a snail—one of those which just now are very common—about 1½ inches long by ¼ inch diameter, and of a sandy colour. The brute had swallowed the glow-worm, and I could see the light shining inside!