Left-handed Turrid - Antiplanes perversa

Left-handed turrids, aka "perverse whelks" have a rare trait among gastropods (snails). Their shells are "sinistral" meaning that they turn counterclockwise.

Snails with hands?

Most all snails coil clockwise as seen in the common dogwhelk , Nucella lamelossa.

Green topsnail

The right way to turn?

This green topsnail shows the far more common clockwise (or dextral) coiling.

Capable of creating nuclear whorl

The first whorl of a snail is refererred to as the "Nuclear whorl", many snails, such as the dogwhelk lay eggs with "crawl away" larvae.