callianassid coprolite burrows

[Rowboater]

Although I haven't been beach hunting much this winter (fishing was great until a few weeks ago), I rooted around for my shrimp coprolite burrows.  Lately I have been finding less of the cylindrical 1-3" long burrows and more broken pieces.  @Carl @GeschWhat are the experts on these things, and lately I've found more of them on the beachs than shark teeth (Covid-19 opened the interest in beach combing so more competition for teeth.)   Difficult to get much resolution, even enhancing the contrast, but this is a scan of most of my collection:

 

[GeschWhat]

Wow! You've been busy. 

[Carl]

That is just absolutely fantastic!