New Baby Snail?

[Madam Macaw]

I have a couple of snails in my 55 gallon tank. I found a little bittie snail last night who was sitting on one of the big ones. Now, since I do have some plants that I got from the LFS - about a month or so ago, how do I tell if this is a little baby snail or a hitchiker from the store? I have not seen any eggs anywhere on the tank, but I am sure it could have been in the gravel.

 

[cokers]

look at the shape of the shell. if its has swirls its ur baby snail.