Dreams dictionary: Snail
Dreams dictionary: Miller Dream Interpretation
Snails crawling in your dream, signifies that unhealthful conditions surround you. To step on them, denotes that you will come in contact with disagreeable people.
Dreams dictionary: English dream book Zedkielom (Morrison)
See snails - it is not a very good dream, foretells that you will annoy some low, people full of evil designs. Be careful, otherwise you will suffer from their wiles, it warns that dream.