Shellless snail?

[Phatfish]

Have no idea what I just spotted, but it looks like a little black snail with no shell. It has little spots running down its backside. I couldn't get a decent pic cause it was crawling back into the hole it stays in by he time I got the camera on it. It has antennaes like a snail or slug.

 

[Phatfish]

Here's a better pic.

 

[Rybren]

Have a look at Stomatella snails. They are one of the good hitchhikers.

 

[Phatfish]

@Rybren I read about 'em and I'm pretty sure that's it. Thanks !!