The snail set you're looking for begins on page 50.
The Author's site: https://sites.google.com/site/onsguropaperchildgallery/myartworks
Snails are series 7.
The Author's DeviantArt: https://www.deviantart.com/onlmy
It's too bad they haven't been active in about 2 1/2 years (and only one picture in the last 5). But when real life gets in the way, not much can be done.