Wandering Snail

Wandering Snail

Observation - Wandering Snail - UK and Ireland. Description: If I keyed this out right it is Radix auricularia or Lymnaea depending or wht book I use, found in a fast flowing river.Not sure of its common name?

If I keyed this out right it is Radix auricularia or Lymnaea depending or wht book I use, found in a fast flowing river.Not sure of its common name?