Looking at

http://www.themodernantiquarian.com/image.php?image_id=13709

It looks as if there are either two rows or that there are some going off at right angles - very difficult to see.

If the former then could it denote an old trackway?

If the latter then some form of enclosure?

I suppose what it really needs is mapping out accurately and seeing what that tells you. Could be worth doing. It looks interesting.