Can the Nassarius Snail move on land, or just in the water?

My science project this year for school has to do with snails and how different surfaces affect how fast they move. At my local pet store the Nassarius Snail is very cheap, so I was planning to use those. The only thing is they're water snails and I need to make sure they'll move on dry land. Is this possible?|||They cannot move on a completely dry surface. They can move on a moist surface, even though they are not submerged in water. Also, if they are really Nassarius, they are marine snails and require salt water. If they are fresh water snails, they are not Nassarius. If you want to study movement on dry land, work with land snails.