Then I'm out of date on my anomalous animalia. I'm unable to think of any current creature that carries compound eyes on a stalk, which seems unnecessary as the bulbous eye itself already offers an episcopal view. But maybe the stalklike projections didn't wiggle, just getting the eye a little farther away so the body doesn't block so much of the rear view. I wonder how they fared once fierce armored fish like Dinychthes were swimming the Devonian seas? I would rather be a trilobite who could conceal itself in the muck at the bottom. 
