Slugs – position of pneumostome (respiratory pore)

You now need to take a closer look at the pneumostome.
Is it in front of the mid-point of the mantle, or behind the mid-point?

If your specimen has the pneumostome in front of the mid-point, like the image above, then click on that image to continue. If it is behind the mid-point, as in the image below, then click on that one.