[Don Joe]

Look above the black rectangle and 80% down the length starting from the left edge and you will see another circle of dots.

Doesn't look so much like "dots" to me, but more like a round object with a series of radial arms. Maybe something like the "stars" at the lower left corner of the photo.

[chimera]

I have a fossil of a crinoid and there is a section of it that looks very similar to what that picture highlights. But looks can be deceiving, and we shouldn't jump to conclusions. Unfortunately, we don't have men there (yet) to grab a sample and bring it back for closer scrutiny. Maybe in the course of time...

[FireTrack]

"Doesn't look so much like "dots" to me, but more like a round object with a series of radial arms."

I agree that these particular artifacts appear to have radial arms. They seem to be scattered throughout the "grind". I think they're something different from the worm looking critter unless the worm is one of these from the side.