These are brown and kind of shapeless, but if I had to name a shape it would be a 3-D rectangle. They're longer than they're wide, but definitely not worms. When I got many more out at the beginning of my parasite work in April, they had a definite smell that I think Andreas refers to as putrid. But as far as I remember, I think I've only seen them as a result of the liver flushes. they're definitely not olive or grape shaped, though.