Well I hope there's enough of this fabric now that I've had a good look at it. This was part of a mystery bundle it a stretch cotton from Fabricmart. It's like nothing else I have in the stash, but as I was laying it out I noticed some irregularities. Some black circles were darker than others on the back, so I flipped the fabric over and had a closer look.
Here's how I've marked it to avoid cutting into the areas.... painters tape:) I've marked the areas with defects, then again at the selvage so I can leave these areas as space between the pattern pieces.