Gastropod ID's needed

Couldn't find these on the pages Indiananatives provided (which are great pages, nonetheless). First is a snail that's quite common in my backyard. They get to about an inch long or maybe a little bigger and have a non-concentric operculum. The tentacles are kind of long and skinny.
The second one Also has a non-concentric operculum but only gets to about 1cm long. I found them in the Etowa or Chattahoochee (can't remember; it's been a while) river drainages. It's tentacles are shorter and stubbier. I have yet to get either to breed, so I'm not sure if they're vivaporous or ovoviviparous.

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Edited by fishlvr, 09 November 2008 - 12:43 AM.

The natural history museum at the University of Florida has extensive on-line images for native gastropods. I don't have the URL at hand but it's easily found.

The first one is an invasive Japanese Trapdoor Snail. I don't know about the second one.