Spider Egg Sac

spider egg sac
I took this picture a while back of some type of spider egg sac. It was attached to a wall near the shower. I observed it over several days while it began to plump up and then the ants became interested in it. One morning I saw two holes punctured in the sac that I think were caused by predators because I never saw a bunch of tiny spiders around the area. What caught my eye about this was the color and the texture of the papery like material. It was about two inches long.