What species were you looking at when you drew this? As a student studying to become a paleontologist and a closet fossilphiliac (as opposed to... I don't know.. a necrophiliac? Bad example... or perhaps quite apt. Who knows?) this interests me very much seeing as I have yet to see a trilobite with what appear to be antennae like what you have drawn. I have seen crazier trilobites though, so it isn't outside the realm of possibility.