Hello Again, Redwood Forests

On Mondays, I get out of school a few hours early. I took advantage of the time and went out to the Santa Cruz mountains once again today.

Western Forest Scorpion
(Uroctonus mordax)

I found a few of these under a rock near a stream. No idea what they are, but this one moved around on my hand. They seem to be some kind of terrestrial (but they may be aquatic) isopods.

The underbelly of the creature.