Well, I looked at it again, and it doesn't look segmented to me. Also, I'm not sure what a head would look like. But tomorrow, when I have plenty of time, I'm going to dig out my box of Science stuff and see if I can do some dissecting.
I will definitely post anything that I see. In the meantime, I'm going to see what I can dig up at the library.
Thank you for your wonderful replies! I just wish I knew what I was looking at and looking for!