I found yet another slug in the neighborhood. This one is probably a Gray Garden Slug that is an invader from Europe.
Do you know the anatomy of a slug? In this photo we can see a lot of the major parts (see this Oregon State University link for a good diagram):
- The big hole is called the pneumostome. Slugs breathe through it.
- The covering that the pneumostome is located in is called the mantle.
- The ridge along the back of the slug is called the keel. Not all slugs have a keel- this one does.
- The bottom layer that touches the ground is called the skirt.
- The rear part of the body is called the foot.
- The tentacles are hard to see here- I must have scared this slug and it retracted its eyes and feelers.