I think it could be an egg.
I'm not freaked out or anything. I just figured someone might know, and if it's a certain kind of critter, I could be ready to deal with an outbreak.
It seems as I've noticed these 2, and not seen any bugs, it's likely not something to worry about. I did collect those 2 samples, and put them in a jar. If anything hatches, I'll post a pic!