I just found another centipede in my bathroom (this is the 3rd or 4th one in a month), this time in the middle of the floor instead of in my shower. I captured it in a jar and counted its legs. It only has 40 legs. I was hoping this meant that the creatures I've been finding are not centipedes, but perhaps some friendlier, less deadly creature. So I googled "is it a centipede if it only has 40 legs?" and discovered that the average centipede has 40 legs. Dang.