I've been doing some experimentation with plotting parametrized surfaces in maple, and I would like to get some ideas for more things I could do. I'm not very clever at figuring out new parametrizations, but I'd like to do some things with seashells. The plots I'm coming up with are very simple, like little moonshells or olive shells. I'd like to do some more complicated ones, like lyria and those spiky shells (that I don't know the names of!). I'd welcome any and all suggestions, this is quite fun!