Last week, I found this neat snail outside of Alex's classes. I have never seen a snail like this! The snails we had before only had 2 sets of tentacles - this one has 3! So, I did some research.
The apple snail website talk about the cephalic tentacles, which I believe are the ones without eyespots, and the labial tentacles or labial palps. I believe from this site that both of these sets of tentacles might have olfactory (or smell) organs.
Wolfsnail: A Backyard Predator. Our library has the book, so I'll be checking it out. The last thing I learned tonight was that The wolf snail eats slugas and other snails that it catches by following the slime trails that prey snails leave behind. (from this site)