Colimacon is French for a spiral especially a snail shell.
This is a simple adaptation of Wingspan that requires some tricky calculating to make the most of your available yarn.
Imagine making a Wingspan without casting on the extra stitches? This is what you get. However you need to start much bigger to get anything worth wearing and you can’t just keep going until the yarn runs out - you need to plan ahead.
Yarn requirement charts included for different yarn weights and various modifications.