While photographing some lichens on a rotting stump in our yard, I saw this tiny slug with a small, almost covered shell.
with ruler for scale
Image 6 shows the slug hanging from a slime trail attached to Lipstick Cladonia lichen.
I found a photographic slug and snail key from The Evergreen State Univeristy (See slug and snail key), and was able to key my slug out to Warty Jumping-slug, Hemphillia glandulosa (see Evergreen’s Warty Jumping-slug page).
I also saw some eggs under the bark of the stump that look similar to the egg photo shown on the Evergreen page.